@azrael78 I'm an adult and can admit my mistakes. I just try to show that you already have that feature. It just moved to another place. And you can use it in a new way. Or you can continue to moan. It's your choice.

The "same feature, but in a different place and in a different form" is, by definition, not the same feature.
We are all very happy that the new feature suits you well. Unfortunately, it doesn't work for us as we want it to.

Before, you had a long list of closed tabs, not just 3, and they were all in chronological closing order.

I'm using this extension now instead, it can even be configured: https://addons.opera.com/en/extensions/details/simpleundoclose/

But apparently Opera 71 beta & 72 developer are bringing back the feature flag in some form.

It only shows three closed tabs, and not consistently even the most recently closed tabs. Just a seemingly random assortment from different domains. And I have no need whatsoever for something to show me active tabs. I can see those since they're . . . active. They're pretty visible. The ease of retrieving a closed tab probably helped ween me off keeping fifteen tabs open at once, much as tabs helped ween me off multiple browser windows twenty years ago. This might not be quite as bad as trying to get rid of tabs by replacing it with something else, but it's not far off. The closed tab button changed the way I browse; the way I navigate. And it was a fairly clear change for the better. I could browse faster. This doesn't feel like a small loss at all. Which is why I'm now looking at other browsers and extensions to restore the lost functionality. I try to use the search in tabs button and it consistently fails me. It almost never has the tab I want. So I end up going to a less attractive add on to find it. I could go to history, but . . . why? It's more clicks and takes longer to use.

@ericartman92 When some developer really do something for users then its by accident not by porpouse. And it doesnt matter who deside what will change and what not if you call them developers, stackholder, designers whatever... if users complain about somethig then "developers" should at least listen and make some statement about it!
Also in this case its make no sence because no one want that serch useless feature and all want that recently closed tabs button. Its essencial Operas feature from the very beginning and there is no reason to change or delete it. Also no one wanted that!
You "developers" just dont listen to users and just dont know what word "NO" mean. You have some brain issue about that "NO" world or something. I wonder if you (now I mean specifically you) as developer ever change/revert something just because users say they didnt like it. And by this I mean you change it back just how it was.

I cannot say for absolutely every single developer, but believe me, we do listen and it's one of the things that really can make your day, or break it. Don't forget that for the most, the software that we're making is just as close as a hand-built house is to someone who built it. The difference is that the majority of work is done for a comparatively specific target audience or consumers, whereas software is often presented to anyone willing to try and it really is impossible to please everyone.
Nevertheless, I still maintain that the decision to remove this feature is moronic to say the least, however I don't appreciate your accusatory tone and the generalisations, especially the "brain issue" part. Please stay civil.
And no, I don't revert stuff just for the fun of it, but there are people that can tell you to do so even if it's idiotic and one has to oblige.

@ericartman92 Talking to any software developers is wasting of time because (even if they listen) they are not willing to do any changes that are good for users. Only exception developers will listen to are big companies which are willing to pay enormous amount of money to developers for that so no money = shut up and use our product!

I wouldn't necessarily put it that way. I myself am a developer and there are two things here - you can dictate your conditions to users when it is absolutely necessary or the tool is a very specific enterprise solution and, just like any tool, you can either learn and use it correctly, or better not use it at all. This case is neither, and it's striking as it's not just users depending on the software (let's not forget that other alternatives are available), but the software also depends on the user-base. Perhaps not on every specific user directly, as in a paid subscription, but more on a general note to back up investment requests, ads or other.

And another thing, it's almost never the developers that make these sort of decisions. It is the stakeholders, designers or product owners that decide this and they are the decision-makers, not the developers themselves. Perhaps the issue is that developers do come here to read, but all they can do is read bug reports, whereas these design changes are simply beyond their ken or any position to influence.

https://addons.opera.com/en/extensions/details/undo-closed-tabs-button/