I know nothing about those specific people, but I can say with certainty that a number of the major TTRPG podcast groups out there have become disenchanted with 5th edition as they go along. Some of them have heavily reworked the rules for their own purposes, some have developed their own new systems, some have branched out into using other systems instead of 5e (generally not as a total replacement, but as a "this campaign will use X system, the next one will be 5e.")
And, more or less, the sentiment I've gotten from all of them is that 5e is...somewhere between "gateway system" and "compromise system". It often does things the participants aren't entirely happy with, but the system is the 900-lb gorilla of TTRPGs. There's friction when using it, but there's friction when not using it, so they're sort of caught in an uncomfortable position where none of the options quite fit.
Which...is not super far off from some of the stuff I had said about the longer-term consequences of the approach 5e ended up taking. People have poo-poohed me on here for using the "everyone's second-favorite edition" argument, but that really does seem to be an issue some of these podcasters are running into. It's not their preference in terms of design, but the thing that would be their preference in terms of design doesn't have the social awareness, nor the massive budget, that D&D has. As 5e grows long in the tooth and folks become more keenly aware of the places where it chafes, some of the luster is wearing off, but the practical "it's the only TTRPG that nearly everyone knows" considerations remain.