I highly doubt any Mac Pro that's running ARM chips would be at all attractive to the content creators that rely on the software and hardware that exists and would need a complete dedicated portion of each individual makers time and effort to go out of there way to port over software designed to run on a well supported and easy to maintain architecture in favor of one which has very little practical need within most desktops.
Why would content creators care about how much time and/or effort it will take developers to port their software to Arm?
Arm is a low power efficiency upgrade that gives apples profit margins a boost along with the ability to further control even more aspects of its users ability to use only what it wants them using because of the revenue stream they get in their ecosystem and the ability to attach drm controls across anything and everything. So the idea of apple dropping Intel in favor of its own silicone within devices such as its iMacs and Pros when the benefits are almost none compared with movings its portable hardware over should result in the use of both platforms with the with to AMD being way more of a reasonable way to go as opposed to completely forcing the entire software and hardware industry to spend a lot of money and time developing things that Apple can still offer themselves unless they just plan on developing software hardware and everything in between.
You must not have seen how the M1 Macs kick Intel Macs butts.
Are you saying that Intel Macs don't have DRM?
Software and hardware developers who don't want to develop for Apple Silicon don't have to.
And furthermore, Apple didn't make their own silicone with the M1 nor do the produce any silicone chips in house because they don't have a foundry and they get each of the chips from TSMC and possibly Samsung in the future since those two companies are capable of producing massive quantities of ARM silicone. The M1 chip is a modified version of ARM silicone which apple pays a licensing fee for the ability to use and has the right to modify the registers within the design but that's all. They didn't just all of a sudden design and produce quality processors that are smaller and more energy efficient than a company like ARM which is where all arm silicone comes from
The M1 is
designed by Apple. It's the same as AMD designing Ryzen CPUs and having TSMC manufacture them.
Yes, the M1 is based on the Arm architecture but is also highly customized. Try running Big Sur on a Raspberry Pi.
Also, the GPU is not part of the Arm architecture. That's all Apple.