I used opera as main browser from Opera 5 to Opera 10. Use to have Opera mini on my J2ME phone as well. With every new version, the stack of bugs from previous

I used opera as main browser from Opera 5 to Opera 10. Use to have Opera mini on my J2ME phone as well. With every new version, the stack of bugs from previous versions was piling up and features were being reduced or getting lost to bugs. There were bugs in mouse gestures which was my main way to navigate Opera. Stopped using it when Chrome came. If you remember, at some point Opera even use to ship custom build for you. With name or custom title or something, don't remember the exact customization. My most used utility in Opera use to be notes and irc client which I used to ask questions basically. Never used mail though. Vivaldi promise features at the cost of performance. I have tried to use it 2 or 3 times. It feels sluggish, every click feels late. Can't use all the packed in features like that. Opera was always fast, Vivaldi is just not.