Done their work well?
Do you mean they've stopped innovating? There's very little new in phone technology right now. The whole segment is ready for a new disruptor to 'do something new'.
I needed a 2nd phone last week as a separate device for 2FA. Fired up my old Blackberry Priv. It's running Android 6 which is barely distinguishable from my more recent phone running Android 9. I'd expect the same if I compared an old iPhone with something more recent. This constant focus on thinner but bigger disguises the near total stagnation of the market.