I think it’s more about design. Apple is a company that has set a high standard for design and premium looking/feeling products. I understand that it still works, but I also think it’s not the best design. It’s just not the expectation Apple has set as a brand. Same goes for the mouse that charges on the bottom.
On one hand, I’m happy that Apple is breaking away from some of their earlier values (e.g. recently allowing for more iOS customization) but I do appreciate how well designed their products tend to be. I hope they don’t get sloppy with future products. So yeah, it’s just a silly power button, but it just seems out of character for their brand.
USB-C has been out for years. The only issue IMO is that since USB-C negotiates power delivery, it might not be as easy to split out a USB-C port into multiple USB-C ports. Spitting USB-A ports is easy since they only do 5V, and spitting USB-C into multiple USB-A ports should be fine. But if your peripherals all become USB-C, you might find yourself running out of ports fast.
I am not an expert. I probably got something wrong there, but that’s my understanding.