It's smooth. I'd say more smooth than older Androids (<7). Haven't seen any UI hiccups on Xperia 10ii nor Jolla C. Definitely the most polished Linux smartphone

It's smooth. I'd say more smooth than older Androids (<7). Haven't seen any UI hiccups on Xperia 10ii nor Jolla C. Definitely the most polished Linux smartphone experience (outside Android if you still consider that a Linux smartphone and not a tracking device).