I think the UMA is the secret sauce for faster PC/laptop that people tend to overlook since You Can Never Has Enough RAM (TM).

I'm planning to buy HP ZBook Ultra G1a laptop with AMD Ryzen Strix and it seems to be a very good alternative to Apple M series laptop [1]. It can support up to 128 GB RAM (up to 96 GB VRAM) and should be able to run GPT-OSS 120B model.

[1] HP ZBook Ultra G1a 14" Mobile Workstation PC:

https://www.hp.com/us-en/workstations/zbook-ultra.html