I think that a B22 might be known as a "student enlarger" because they are rugged enough to withstand the use and misuse of a student population using a school darkroom.

I used one for a few years in a shared darkroom that I maintained. It was old when I started, and even older when I left, and with the exception of keeping it clean, I never had to do anything to maintain it.

If it is in good shape, and properly in alignment, and lamps are still available, it can probably last you forever, and give good results.