[pjmlp]

So simple that layout managers were already a thing, even if Electron kiddies have no idea about them in native UIs.

By the 2000's doing pixel perfect native UI was a sign of being lazy to learn UI best practices.

[Ygg2]

Say what you want but for modern UI localization and accessibility are part of minimum feature set. Those two massively increase complexity (UTF8, IME, Braile, Text to speech, etc.)

The big issue I'm talking about is cross OS UI Toolkit. Great your UI supports IME on Windows and Mac. Now do that for Linux, BSD, etc.

[pjmlp]

First they have to decide what distribution actually matters for the desktop, out of hundreds that get forked for frivolous reasons.

And yes accessibility and localisation were already a thing in Windows 3.x, classical Mac OS, OS/2,...