What split do people follow if muscle maintenance is your goal?

I currently run a 5 day split: push pull legs torso limbs

I still feel I have gains to make as I started lifting consistently quite late in life.

I'm currently 48 so realistically in a couple of years I think I should just be happy with my physique and look to maintain. I presume to maintain you dont need to be training 5 days with 2 x frequency?