@cinnamoroll I've thought a lot about this, not because I'm near my natty max, but I'm near my max of what I can accomplish in my 40s, while working full time, and having a lot of other interests, some of which clash with bodybuilding in terms of energy requirements/recovery.
To that end, I heard Eric Helms offer an interesting idea on this in a podcast several years ago. Wish I could find it, because he might have provided some nuance that I can't. But what he basically proposed for people that are bumping into their ceilings is to stop trying to train everything and focus on one muscle group.
If you were to suddenly do 30+ sets a weak on chest, you would see gains. Of course this would be intense, and so the offset is lowering (or removing) volume elsewhere.
This isn't forever, as you would eventually start to atrophy. But you can do a 12 week chest specific block, and your other muscle groups will be fine. You'll lose a little strength but you can quickly get it back.
Might be worth a try. I keep proposing this on here to posts like this in the hopes that someone at your level will do it and report back, so this is somewhat self serving.