They are harder to control if you don't use a controller.
Using a controller is cumbersome when you're not at home
I don't know if I can play these ports in 10 years. With a console, I'm pretty sure my PS5 games will work in 10 years because the platform won't change and the PC is at least an open platform, so there is a chance that older games will still be playable on newer systems. But on iPhone it's not guaranteed.