Comment by LtdJorge

>> do something like pre-X macOS, where it would provide a warning when you are getting close to running out of memory

And I've run out of memory while compiling packages (I'm looking at you, composable-kernel) on Gentoo. It's not like it can notify me and I close things in the milliseconds it takes for a few more GCC processes to spawn and allocate and fault all the remaining memory.