I still very actively use a Mac Pro 2013 (aka trashcan). It has 64 GB RAM, an 8 core Xeon cpu, and 1TB NVMe. I'm running macOS Monterey (12.7.6) on it. The hardware is still plenty powerful enough to be very useful. Supported software is getting to be more troublesome as the days go by. When the pain gets too great I'll look into installing Linux on it with the goal of continuing to use it.