commentzilla

One thing for certain. Resellers are having a hell of a time unloading those 2016 and 2017 models. It's not just the keyboards, it's the thermal issues that make those new laptops no better than 2013-2016 models. Once under load the machine cannot dissipate the heat, so it throttles. So the spec look great on short tasks but it suffers for sustained loads...

Apparently the GPU cannot handle sustained loads, and must be severely throttled back after at most about 30 seconds.
https://macperformanceguide.com/MacBookPro2017-sustained-performance.html