Yea, except for the fact that NO ONE can find anywhere to BUY a 2021 license so this is a mute point.  If you go to 2021 you'll have to perpetually run it on trial mode.

From what the reports out there say, 14.1 will run with 2019 even if they "don't support it". they "don't support it" anyway, if anything goes wrong with any part of 2019 they'll tell you to go suck an egg.