It all depends on the player when talking age.
He didn’t get many sacks last year so maybe he’s slowed down.
There’s there’s a few guys that are lightening until 35 and beyond.
Mayweather was title holder at 38.
It’s genetics maybe, how much damage you’ve taken, i guess a bunch of things.
Don’t know about the specifics of Green Bay but if there are no other threats, then a good offense can just double team players like Matthews and shut them down.