This is a really good point. Modern CPUs remind me of home internet with maximum speeds advertised even though pragmatically it isn't anywhere close to what people will get. Laptops, Intel NUCs, AMD desktop APUs, etc. all take a huge amount of BIOS tweaking at least to make them run hotter before they throttle, use less power, and possibly disable temporary clock speed boosts that heat up the CPU too much and make it throttle. Anything in a small enclosure seems to be an exercise in optimizing heat.

More airflow, lower max clocks and higher throttling temperatures make a massive difference on the set ups I've worked with.