@burnout426: Thank you for your suggestions. I might try that once my schedule is open (very busy month).
Though I was installing "stable" version in hopes of it being actually stable. If I wanted to test and debug Opera, I'd go for beta version. Like wasn't that the reason of all those branches existing in the first place?

@pavelopdev: I find Opera being a lot useful actually. Was.. In my opinion "crash culprit" is Opera 74 itself, as 73 was actually stable in that regard. And I don't really have the time to investigate it properly, simply because another browser manages to do the same without crashing. Maybe later.
Though thanks for the idea of using backup software, I don't use that due to my PC and OS being stable without any repairs and reinstallations for more than 2 years (along with that Opera profile, though had to "manually repair" it few times due to rollback) and having all work related stuff on another drive.

@pavelopdev: The thing is that 73 was working fine. Only when updating to 74 (no mater what build) it starts insta-crashing on what seems to be random actions. One that has 100% chance of crash happening within a minute was hovering over youtube thumbnails, triggering mini-previews. I though it was related to video decoding, but disabling hardware acceleration via flags had no effect. I've been reporting it probably since 2nd or 3rd update of 74 came out. Last update still had that problem and I lost my profile trying to roll back, so I just switched to another browser, which I hope will be more stable than Opera.
There might be something on my side though: like some outdated extensions (with no alternatives), or my habit of deleting autoupdate, installer_helper, assistant and crashreporter executables, due to concerns about privacy and lack of ability to rollback because of forced-auto-updates.
I hope by the time my current browser ends up into another crashing mess (they all do for some reason), Opera would become a good alternative to come back to.

Multiple "stable" updates of 74 version, every damn one of which kept crashing for no apparent reason, finally made me switch browsers. Thank you!

Is it safe to update now? Random crashes fixed?

BS-748.. Weird ID for an issue. I hope it'll get fixed soon. Had to downgrade. Again.
I wonder if Vivaldi is good now?

@shion-san Scratch that. Opera crashes randomly again. Started with YouTube. And I've already removed profile backup I had.

@hectormaciasa1979 Looks like they fixed random crashes. At least none happened for about half an hour.

@leocg: Last time I've upgraded, Opera started to crash randomly for god knows what reason. Ended up downgrading, and it costs me some extensions loosing data/settings every time. Which is very annoying.

Is it safe to upgrade now?

As usual, "stable" release is anything but stable. For some reason Opera closes on its own now for unknown reason. This time no opera://flags are in non-default state. And as usual, rolling back to previous version breaks some extensions data.
Opera once again proves that they fail at testing and don't know what "stable" means.