Yes, I know it's a duplicate of questions that have been asked before, for example this one: Are there advantages of dedicated bike computer instead of smartphone apps?
But I feel that most of the reasons given 8 years ago in response to this question have been invalidated:
The phone is larger → yes, but you still have to have it with you
glare → max screen brightness has improved a lot in recent years
not designed to sit out exposed to hot sun, extreme temps, and rain → not really true any longer, with the arrival of IP67/68 resistant phones
ease of use → new phone apps like Komoot, Strava, MapMyRide, etc. make the phones seriously better for bicycling than 8 years ago
battery life → much improved, with a new iPhone I'm getting at least 6 hours of use on the bike, and that's with the Komoot navigation on; for longer rides, it's easy to pack small power banks.
So my question to anyone who is still using and paying for specialized bicycle computers like Garmin and Wahoo, in 2019, what are you getting out of them that a contemporary smartphone doesn't give you?