Bigger caches. Making entire RAMFS or tmpfs partitions (filesystems but in RAM) for applications or tinkering with things. https://wiki.debian.org/ramfs , Virtualization / VMs, databases. Loading large files into RAM instead of having to read by row/column on a HD.
I'd rather have more RAM available unused than not have RAM available and need it. Been the general rule of thumb for me for the last 30ish years.
I'd rather have more RAM available unused than not have RAM available and need it. Been the general rule of thumb for me for the last 30ish years.