That gets back to why players don't use feats. Anecdotal though it may be, my experience correlates with
@Dausuul as per above. The majority of players won't use feats due to the levels the games are at and competition for ASI's early.
Player's not selecting feats doesn't actually mean feats are banned at a table. That would be jumping to conclusions. I do find it's pretty common that no one has taken a feat a low levels but that's because they've taken ASI's instead, not because the feats are banned.
On that same note, the game works for me without feats too. I skip them a lot on MAD classes. I'd happily play a game without them and
@Parmandur is not being unreasonable in not liking them. Feats add complexity that isn't necessary at the same time they add options, so to each his own.
I just don't think tables are banning them so much as players are choosing not to take them until levels at which the number of players is more limited.
It's a bit of a tangent though. I think the typical table still 5e party still runs with a fighter, cleric, and rogue. I'm disagreeing with the article in the OP at this point. Wizard vs sorc vs warlock seems almost interchangeable for what's typical, and a fifth melee seems common with barbarians or hexblade warlocks. The article would be better if it was an actual percentage of class break down at each level with a comparison of how many characters there are at each level. IMO.