It cuts down most of the crap trying to trash your machine's RAM (virtual memory in the end, but today it's almost as if you didn't have a MMU). It's good enough.

On less powerful machines, dear Mutt+isync+msmtp users like me, please use AERC (written in Go) against these. It's slower, but far more secure than C. Also, SLRN needs a Go rewritten clone (able to point to slrn's caché) like nothing else. Comp.misc and comp.arch still are extremely valuable.