> bottom tab bars are much better

The last time I looked they were incredibly fragile to implement on mobile device browsers. Mobile Safari had borkage: rotation or tab addition/deletion changing the page height such that you occasionally lose the bottom bar; input focus loses the bottom bar or leaves the bottom bar occluding elements (position sticky doesn’t recalc when page scrolls). Problems with strange interactions with the browsers own bottom bar. Both have problems when the page is zoomed, which seems to happen sometimes even if explicitly disabled e.g. input focus?

I could make something that looked like it worked, but when actually manually testing it hard, there were show-stopping problems.