All of them. Seriously. Except iMessage. Everything else? They range from mediocre to outright unusable and none of them are reliable. I've written about Apple Music. That one launched and cost me a phone battery. Duplicate tracks, halting playback and heat.
That’s capitalist innovation baby.
Build a walled garden market then enshittify everything cuz everyone is already invested.
Once Apple reaches their peak growth, expect the company to come tumbling down hard with bad choices.