Interesting post. I would throw in a social angle. Android will suffer from UI lag until it's scrapped and rewritten, because its early development was heavily influenced by Romain Guy, a developer who was a huge proponent of Swing and who actually thought that JavaFX was a good idea. This is a person who has basically never seen a responsive UI and cannot understand what makes Android "laggy" at a deep level. Some of your other links show that Android is pretty long on people who will write long defensive blog posts, short on people who can make efficient, responsive graphics stacks.

Social problem, basically.