Doing 1) AND 2) is perfectly possible. If you're writing it in a performant language. Opera has proven that by still being faster (qualifier: on windows and whe

Doing 1) AND 2) is perfectly possible. If you're writing it in a performant language. Opera has proven that by still being faster (qualifier: on windows and when excluding JS-heavy tasks) than either Chrome or Firefox. Just a simple thing as switching between tabs is immediately noticably faster in Opera than either of those, even when you have 100 diverse tabs open. Vivaldi's problem is that they're building on top of chromium in all JS, which puts certain limits on just how efficient they can be performance-wise. Additionally they're constrained in what they can implement by being tied to chromium, anything they can't do with chromium as it is, they'll have to implement changes in chromium and either live on a fork or try and push them upstream, both of which have high organizational costs. Also, as a sidenote for the Opera email client: I'm curious how you think it was weaker than Thunderbird? I've been using it for over a decade and technically i find it far superior, just with its ability to set up mutually inclusive folders that automatically sort email into themselves based on the same bayesian patterns that work for spam, and can be taught simply by dragging things in/out. Additionally, the comment about it "taking up room" is senseless, since it only uses any CPU/RAM if you actively enable it, and Opera's installer has always been tiny.