I think it’s probably a case where they’d tell you to use the right tool for the job. The Apple Watch Ultra is their answer for fitness tracking which does everything you need for post ride analysis. It’s just missing all the live info you get from a bike computer.

But bike computers are likely always going to be nicer to use than a phone because part of what makes them good, makes them bad for normal phone usage. Their displays are quite washed out and dull but are extremely visible in direct sunlight while using minimal power.