First Mover effect seems only relevant when goverment warrants are involved. Think radio licenses, medical patents, etc. Everywhere else, being a first mover doesnt seem to correlate like it should to success.
See social media, bitcoin, iOS App Store, blu-ray, Xbox live, and I’m sure more I can’t think of rn.
It's a huge, diverse ecosystem of players and that's probably why Android has always gotten the coolest stuff first. But it's also its achilles' heel in some ways.