Knives as a hobby has pretty much completely replaced my previous hobby, tabletop wargaming.
Because, wait for it........ tabletop wargaming was getting TOO EXPENSIVE
lol
Also, it's a much bigger time commitment. Buying models, assembling them, painting them, packing them up and taking them to play a 6-hour game with HUNDREDS of pages of rules. It was just too much for me.
"Knives" suits me better I think.
Carry one daily and actually has some use outside the "hobby" aspect.