From his website stallman.org:
Richard Stallman has cancer. Fortunately it is slow-growing and manageable follicular lymphona, so he will probably live many more years nonetheless. But he now has to be even more careful not to catch Covid-19.
Recent video of him speaking at GNU 40 Hacker Meeting. Screenshots of video stream.
-R removes a package. -Rs makes sure that all the then-unused dependencies are also removed along with it. -Rns is not really recommended for general use, but the -n flag removes configuration backup files (in case you consider those bloat).
For more info, check: https://wiki.archlinux.org/title/Pacman#Usage
Thanks!