It also means that the rendering will potentially be different on each platform given they all use different native webviews (and there’s no “native” webview on Linux but WebKit-gtk is the most widely used one)

Not really. Helix is closer to Kakoune which is based on the modal editing of Vim but reimagined a bit.

There’s a pretty simple reason. It’s that developers don’t have to spend the time to package for every single distro. I know I wouldn’t, I’d just focus on packaging for the distro that I use and flatpak. Having flatpak also means that some less known distros start with a big amount of apps available from the get go with flatpak.

I’ve been going to the gym 2-4 times per week for about a year now. It’s a massive chore every single time and I don’t enjoy doing it but I do it for health benefits.