I'm going through the Apple self repair process currently and it has been excellent. I spilled coffee that managed to get inside my Mac Studio (via the front ports) and it stopped powering up. I downloaded the self repair manual and followed the instructions to disassemble it; found coffee on the power supply which may have caused the problem. I ordered a replacement power supply from the very well organized self repair order site. I was also happy to see that they promote recycling by giving you a good amount of money back if you send the old parts in. I'll find out on Monday if my theory about the power supply is correct :)
I don't know how much of this is due to the new regulations, but it has been a very smooth process.