True. I remember a video editing class in college and we had to use the cheese grater Mac Pro render our work. I don't remember all the details but I know I didn't want to try it at home on my white MacBook.
The gap between laptop and desktop with today's M1 MBPs is much more narrow for sure.
True, a lot of this moved to laptops for Innovator's Dilemma-reasons, but surely they have a plan to secure a more few niches, beyond FAANG software developers for the Mac, and students for the iPhone and Watch? The iPad was intended to dominate "what comes after PCs", but PCs never went away; and it just seems like Apple never course-corrected from that vision. That's what I'd like to see: a coherent vision for the future of computing. We haven't seen that since the failed post-PC thing in 2010.