The webOS UI from 8 years ago is still way better than the latest from Android or iOS today. The apps and implementation may not have been that great from a performance perspective (even then), but the UI was/is absolutely better.
If you want a specific feature, I'd point to first-class multitasking and cards, real menus, good combination phone/tablet UI via Onyx (I'm looking at you Android), JustType, Synergy (all your services working together instead of being separate islands in your phone), gesture zone, etc.
The webOS UI from 8 years ago is still way better than the latest from Android or iOS today. The apps and implementation may not have been that great from a performance perspective (even then), but the UI was/is absolutely better.
If you want a specific feature, I'd point to first-class multitasking and cards, real menus, good combination phone/tablet UI via Onyx (I'm looking at you Android), JustType, Synergy (all your services working together instead of being separate islands in your phone), gesture zone, etc.