[zozbot234]

> Phone UI paradigm isn't as easy as "Let's just scale down the Desktop/Tablet applications".

Have you tried modern Gnome/GTK+ 4 applications? You can resize the window to a tiny size and it seamlessly "scales down" to a phone layout. Very handy even on a desktop. Yes, there are real differences besides size (phone UI needs a lot of inactive padding around tap areas because finger taps are imprecise; it greatly prefers swipes to taps, while a pointer-based UI prefers clicks to drag'n'drop; phone UI needs long taps as a secondary action, etc.) but they're minor in the grand scheme of things.

[pjmlp]

You mean modern in the sense that is no designer any longer, one has to code everything manually, and the designer that was going to be done, was based on Web technologies?