Before that, it was hangouts and regular people didn’t know about it.
This is their biggest problem, They themselves fragment their user base. We were on hangouts, you could even get your google voice calls on it, we didnt' switch to allo or duo, till they announced they were retiring hangouts. And now all three are gone.
We stay away from Google now.
Just off the top of my head, Android allows multiple browser engines to work on it, allowing firefox to use extensions. Android can torrent, while you can't on stock iOS without hacks. Firefox with extensions on Android is god send if you're a power user.
For someone who claims to be a power user, it's really showing… And don't forget open source ecosystem is much much much bigger on Android.