they've written a custom GPU framework to achieve the performance the level of performance they have. it's currently only compatible with macos, but is being ported to other operating systems.

They already have very experimental Linux support. You have to build whole app yourself though. I'd say that in month or two we'll get a binary. You can track Linux porting progress in this issue

I mean on the one hand, the hardware acceleration is awesome. The GUI toolkit is not of course (I assume MacOS has a default one to make everything look like it belongs?), but at least they made it look like a native app instead of the usual electron shit where it's clearly a web page with a window border and some design 15y old me might think is cool but 16y old me would already have been ashamed of.

Its already possible to build manually on linux and there's a tracking issue.

*edit. same as the other post

Sounds like gimp with gtk (gimp toolkit) all over again

Time will tell for sure, but helix is looking really good and once they have support for plugins I'm rather sure it will be a very, very powerful editor.

It was more than just tab conversion. For example, it decided on its own that:

if(...) {
    ...
}
else {
    ...
}

would look better like:

if(...) {
    ...
} else {
    ...
}

I mean I guess I could live with that, but really? I imagine there's some config where you can disable all this, but it just doesn't seem worth some giant git commit every time I touch a file with the editor.

Lapce looks pretty cool, for an alpha.