There is a maximum size after which individual cells will split. It becomes harder to regain your old shape because when you lose weight the existing cells shrink but never shed, so you can end up with new cells you can’t get rid of.

For the tiny minority of people who lift for hypertrophy, they do gain new myonuclei. That's probably the only real exception though

Do the skin cells to contain the fat also only get larger? And what about the beer drinking muscle ?