I was vocal in meetings with regulators that it was a stupid** move.
When residual solvent testing was first implemented, there was a limit. 5000ppm. (rumor has it that) all the CO2 guys failed their first try. then bitched so hard that the limit was removed. based on the federal guideline that any amount was ok, so long as it is called out. they actually removed ALL alcohols from testing for a month or four. then restored MeOH, IsoP-OH and Butanol, but left EtOH off the list. I suggested 500ppm for inhalables based on the data you (almost) cite.
these are the same clowns that defined CO2 as a hydrocarbon.
this 2016 document lists 5000ppm.
this 2017 document lists no limit.
many labs still test for it. 500ppm is easily achievable, and my go to target.
They also managed to tangle up tinctures for 6-8 months if I recall correctly. they were permitted, and defined as “alcohol, cannabionoids, and maybe other ingredients”, but the rules clearly stated they needed to test below 5000ppm EtOH in order to be sold. unclear on the concept…
** I have proposed fixes for stupid on more than one occasion, but I’m no longer convinced that infectious gene-drive style IQ gains would actually solve the problem.