The only "real-life" situations in which I have wanted more than 36MB of RAM in a 68k machine were a) in the case of PowerBooks, for running from a RAM disk (there I think the most you can get is 48MB or some such in a PB190); or closer to home, B) when working with Photoshop, Adobe Acrobat, or Illustrator — or more than one of them at the same time — on a Quadra. Graphics work, which I have done in the past on 68k hardware, is much better with 72MB+ RAM. Then finally, there is c) A/UX 3.x, which likes plenty of memory to work in.

But you are quite right. 36MB (which is what you will have) is plenty for what an LC575 was designed to do.