Please make sure to finish all your posts before this time. The downtime should only last for a few minutes.
Have to use Agent-switcher a lot.
I think I'm done with Opera, after almost 8 years of using it. I don't have enough f-words. You switched to Blink engine for compatibility sake sacrificing everything and now I can't even use 1/3 of sites without a voodoo magic. Have to pretend as firefox here, pretend as chrome there, back to default there...
1/3 of your sites are problems. Good grief! What kind of sites are you going to? It's extremely rare I have a problem with browser sniffing sites. Maybe 1/100 at most. Well, basically, hardly ever, and if I do, I use the extension, User-Agent Switcher,
If one out of every three times, you can't get to the sites you want to browse, I understand your concern. But yours is not at all a typical problem.
Relevant discussion: https://forums.opera.com/topic/2604/what-s-the-point