anecdotally two friends of mine wanted AMD but bought Intel because of availability. You may be right.
Try running two 4k external monitors on a Haswell MBP.
They look about the same, but a Haswell MBP13 (Late 2013) is very much less capable than an Ice Lake MBP13 (2020). Not all of that difference is attributable to the CPU I suppose, but the graphics and thermal throttling under load certainly are.