About 6 months ago I upgraded my desktop from 16 to 48 gigs cause there were a few times I felt like I needed a bigger tmpfs.
Anyway, the other day I set up a simulation of this cluster I'm configuring, just kept piling up virtual machines without looking cause I knew I had all the ram I could need for them. Eventually I got curious and checked my usage, I had just only reached 16 gigs.
I think basically the only time I use more that the 16 gigs I had is when I fire up my GPU passthrough windows VM that I use for games, which isn't your typical usage.
The issue isn't just a simple oversight. Git includes the file name as part of the tree and commit hash. The hash has security implications. There's really no way to make the hash support case insensitivity without opening up a multitude of holes there. So there will always be a mismatch, and you can't just fix it without changing how git works from the ground up.