Mobile workstation. There are some Xeon notebooks which also can take more than 64GB - but they have bad availability, cost about the same as a high end mac book pro, are significantly larger and heavier, run hot and have shitty battery life for comparable performance.

The overall hardware situation has been ridiculous for many years now. I recently got a new Dell Latitude for a customer project - runs hot, performance and runtime suck. Runs out even faster than my tiny GPD pocket 3, while providing worse performance. Compared specs - they indeed stuck a smaller battery into the business notebook than into the portable toy. We're now at a point were a Chinese niche hardware maker does better thermal management for x86 systems than any of the established manufacturers. Current AMD mobile CPUs are great - and I'd love to have a good notebook with one, just nobody bothers building it.