The internet and the surrounding context changed so fast that it made little sense to cling to old email addresses made in the old context. Gmail represented the 'new internet' and old patterns became obsolete (less subversive, more mainstream/corporate). When there's a seismic shift in usage patterns that's when all bets are off regarding where everyone lands. Being the first mover means little here. If the way people interacted with AI underwent a massive shift, OpenAI would likely get left behind. The only safe bet is to invent your own killer.