What other hobby...


has has an infinite number of variables like this one?
needlebrush
Auto detailing.  Guys will spend thousands on 1 tub of wax. An infinite number of detailing products on the market and the enthusiasts are just as vocal about what is snake oil and what isn't. 

Right. They all do. Any time anything seems simple, look around, you're missing something.
HO Model Railroading
Gardening
Wood working

AND the greatest hobby of them all;

Retirement, is the greatest, sport, hobby, and THING ever invented.
Too bad it took me over 45 years, to figure it out..

Favorite animal.... Terriers, and Hummingbirds, Both just like me. ;-)

Regards