It's not incorrect to say that the ceiling for single-class builds has also been raised
That you have to phrase it like that demonstrates that the stretch is definitely not on my part! Nor really yours! But on the blogger.
"Single-class" and "not incorrect" and "raised" is very different from:
also that it had chosen to fully indulge a decade’s worth of munchkin demands for MOAR POWER!
That's a lot! That's a wild and
prima facie untrue claim to make.
We can argue that in some cases,
if you only consider single-class builds (which were never the main offenders, balance-wise, and still aren't), there's a slight increase, but we're talking like, single-digit percent in most cases for non-Martials. Martials are the only ones where you can argue there's any measurable increase in capability (NB I would broadly consider the Monk to be "Martial").
That's not one mis-chosen word either. I mean, you generously say:
And while yes, using the word 'munchkin' in general does suggest a level of disconnect from the current discourse about game balance... I don't want to dump on him and I didn't really expect this thread to go for 48 pages. I perfectly understand feeling that the game has left you behind even if you're not good at articulating the reasons.
But I just quoted what he actually said, which was a lot more than just "munchkin". This isn't just "not good at articulating the reasons", which would itself be odd given the person involved, who is extremely articulate and good at stating reasons, this is either active and intentional or truly disconnected-from-reality (not just "discourse", let's clear that right up, reality, the actual math, the thing he's claimed to be an expert on) mis-portrayal of the facts, from someone is absolutely definitely mechanically competent enough, and good enough at writing that they know what they're doing.
I do think that someone doing that earns themselves some criticism, frankly.