Are you experiencing significant performance penalties due to miner use of 1 lane PCIe risers?

I did some testing for a version of such a service in 2017 and it was determined the typical GPU miner configuration using x1 PCIe risers reduced I/O throughout and therefore performance of GPU hardware to the point of being practically useless for anything other than mining.

I have no experience with the characteristics of rendering, I/O, etc but it seems this also applies.