[math-fun] Conway's "Life" & Covid rule

Well, you need *some* rule that kills off cells. Otherwise once a cell becomes live it remains live forever, so there would be no motion (e.g. gliders), only spreading. Tom Henry Baker writes:

According to wikipedia,

"3. Any live cell with more than three live neighbors dies, as if by overpopulation."

In retrospect, this appears to be a "social distancing" rule.

In various generalizations of "Life" -- e.g., with different sets of rules, on different grid patterns -- e.g., hex, etc. -- are there other interesting versions of "Life" with (and without) "social distancing" rules?