Ram question?

Lately i been messing around with files that up words in range of 10m - 40m verts i was wonder. how do people deal with such large file sizes. having a single one on screen almost cap out my ram limit of 32gb.

i seen people do sculpt that go up to 120m verts how much ram do you need for something like that ?. o-o

feel like i am just missing something basic. :frowning: