Yes! I've been watching since the 90's and there seems to be something seriously off with these current crop of QB's. Many of them look like they are playing for the first time. They look like they can't read defenses and are extremely eager to take off running like Herbert was doing last night. There was a reason the "running QB" was frowned upon in 20-30 years ago. We are seeing why.
For QBs, my theory is that there was a lost generation of QBs which occurred between the drafting of Matthew Stafford in 2009 and Mahomes/DeShaun Watson in 2017. Stafford was the tail end of great QBs with long careers beginning with Manning and Brady but included Roethlisberger, Brees, Rivers, Flacco, Eli and lesser lights in Matt Ryan, Carson Palmer, and Alex Smith. Mahomes/Watson was the first of the current wave, followed by Ryan, Lamar, Burrow, Herbert and now Maye with some lesser lights we could name.
Between 2009 and 2017, there is a dearth of quality QBs and QBs with long careers. We have those whose promising careers were cut short (Luck, Griffin), QBs whose play fell off a cliff (Wilson, Newton, Wentz), mediocre starters (Bradford, Bortles, Jameis, Mariota and I'll put Bridgewater here though injury should be noted), and outright busts (Tebow, three 2011 first rounders, Manziel). The one guy who was drafted in this time who is still a top QB is Dak Prescott, who wasn't even valued by scouts much and went in the 4th round.
That's seven drafts in a row without a HOF candidate QB except for Dak and if you want to argue Russell Wilson.
The only two QBs drafted in this era to still be at all active as a non-emergency starter are redeemed busts Geno Smith and Jared Goff. And one of those is on the way out. There's a missing layer right now of veterans who can still go. What would Indy give for a 32 year old Ryan Fitzpatrick right now?
This lost generation benefitted late career Tom Brady in diluting the competition for his final four Super Bowl victories, and benefitted Mahomes for the same reason. They didn't have to battle mature but still prime Luck, Griffin, and Newton as much as they would have if they all stayed on track.
Now as for the current elite quarterbacks, I think a lot of them have games which won't age well with the loss of their superior athletic gifts. Brady's elite traits weren't sexy. NFL nerds aren't impressed by reading a defense presnap and changing a play from a bad one to a small, safe gain. But he could execute his skills at a high level until he was 44. There's a chance that Mahomes, Allen, and Jackson won't perform as well at the age of 34 than Brady at the age of 44. Also, many of the current elite QBs were not drafted at the top of their drafts. Mahomes, Allen, Jackson, Herbert. #6 pick or lower. Only Burrow was a #1 overall pick and a current elite QB. At the same time, top 3 picks Trubisky, Zach Wilson, Trey Lance all busted and others underperformed their draft position. There has been a disconnect between how NFL evaluates QBs and how they actually perform for some time now and it's still going on.