What the Arc Browser Story Reveals About the Future of Browser Security(labs.sqrx.com)
labs.sqrx.com
What the Arc Browser Story Reveals About the Future of Browser Security
https://labs.sqrx.com/what-the-arc-browser-story-reveals-about-the-future-of-browser-security-55107b9eb621
Things that diverge from browser standards (like frameworks instead of web components, or special APIs) just create a place for things to break.
That said, if you want a special browser you can guarantee will be available, just wrap it in Electron and ship that, like many big players do.