On a different topic, was researching the matter of DP 1.4 vs DP 2.1 and DSC
Evaluating if waiting for a monitor with DP 2.1 is of any benefit for the F word*
Apparently since the only graphics cards with DP 2.1 right now are RDNA3, and they only support up to UHBR 13.5, they also need to use DSC to achieve 4k@240Hz.
And there is no information whether the custom scalers in monitors would support UHBR20 either (or if near future cards would support it)
So if DSC is your concern, forget it. No disadvantage (except Nvidias shoddy implementation) and probably no way around it at least this year.
*futureproofing is a curse word on these forums