I guess I could have been much more clear with my response.
By “Dumping protein” I meant excessive “bro-science” levels of protein - 3 or 4 extra multi-scoop whey shakes each day for example. Doing this with some (I believe mistaken) belief that muscle will grow or at least be maintained.
Simply upping protein a bit to get better satiation, or it makes you feel better or it eases hitting your macros (after becoming fat-adapted) if you can stay in ketosis - great.
Getting and keeping muscle as you age becomes more and more difficult but, from what I have read (i.e. that you can add plenty of lean body mass on 0.6 grams per kilogram) it really seems to be the case that forcing the adaptation - through lifting heavy things - is 90+ percent of the requirement.