This seems like an odd question I know but I have been thinking there are probably so many theoretical hobbies that nobody has actually done before.
More like really niche “sub-hobby” of homebrewing.
Growing/propagating your own yeasts. I did it about year ago and didn’t have a time to get in to it again.
From the science fiction novel “The Syndic.”
Polo, except with jeeps firing .50 caliber machine guns. You have a metal ball about the size of a truck tire and a field about 2 miles long.
That sounds… terrifying. I’m not sure I could even spectate.
Deep water version of your every day metal detecting. I know some companies already do salvage reclamation/research, but I’m talking about going hunting for smaller trinkets and seemingly “worthless” items in the eyes of corporations and research centers.
Only thing stopping me is I really don’t want to be Oceangate 2 lol.