That's conventional wisdom, and I don't necessarily disagree.
But I've always thought it was BB that makes them well run - not so much the Krafts, who got a bit lucky w/ him and Brady (yes, they made the moves to get them - but they had no idea they were getting the GOAT's.)
BB will be 70 next year. I also don't think he's all that as a GM - he benefitted for many years from Brady taking pay cuts, and also making average players look great. Can he do a rebuild in time to still be coaching when it comes to fruition?
And so much comes down to QB. They might get lucky there, or not. They won't have a high draft pick to get one. They might be able to turn a QB like Darnold around, but who knows. I have found it kind of funny on the Pats boards - some of the younger fans say things like, "We have a good young core - all we need to do is add a franchise QB and we're right back on top!", like it's a "just add water" thing.