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.
From what I read it slow growing and pretty manageable as far as cancer is manageable of course. Hope he'll make a quick recovery, and start growing that magnificent beard back.
If Hank Green is anything to go by, it'll only come back stronger.
Edit: His beard I mean.
Yikes. Your comment was very easy to take out of context.
Until I read back, it looked like you were saying Hank's cancer was somehow back stronger than before (which would have to have been practically fresh breaking news), and not a comment on post-chemotherapy beard growth being different, perhaps stronger, than before.
Follicular cancer doesn't sound like it bodes as well for a beard as other kinds of lymphoma (like Hank's was) but hey, you might still be right.
(RMS is a controversial character in some regards. While I wouldn't strictly wish the loss of a greybeard's beard as cosmic correction of controversial behaviour, I'd much rather that than cancer. That'd be too far, Universe.)