you never have the correct change
As a result change accumulates. Every so often I bring it to my credit union and throw it into a machine and deposit it for free.
oftentimes you get changed short
It's very rare and the mistakes sometimes happen in my favor.
takes up too much space
Not usually. Only when on occasion I need to process a lot of change at once is there a significant space requirement.
you have to balance between not carrying too little and not carrying too much
This is trivial. I never spend more than half a second on such a decision. Usually I know instantly what to bring.
hard to track spending
That's a feature.
i believe that we need the option to use cache in society
I believe cache must remain legal tender and refusing to accept cache should result in a felony conviction plus one year imprisonment.
That said, I would eliminate the penny and the nickel, and put the quarter on a serious diet. Then outlaw all the .99 and .95 type pricing. It might be OK to do away with the dime as well and only leave the largest coin in use.
Privacy and the freedom from oversight by any large entity are non-negotiable.
The only oversight I support is me doing oversight on you, and never someone else doing oversight on me. I am not a masochist.
The only thing I want that a gym might have is a pull up bar. Other than that, two kettlebells plus cals plus running give me more than enough challenge. Gymnastics rings on a long belt plus a sturdy tree branch can stand in for a pull up bar.
Unless you are a pro and need access to a climbing gym, which is very hard to completely replace without a trip to a boulder, gyms are rip offs.
I exercise on and off all my life, with at least 20 exercising years. I did college gyms, ymca, paid gyms, and once even a bona fide body building club with a proper hulking ph. d. as a trainer. I have plenty of experience with many modalities.
My two cents, look into advanced cals, and running, and look up "dynamic tension" by Charles Atlas, and screw the gym. If you can, add some kettlebells and a pull up bar. With dynamic tension you can do pulling movements without a pull up bar.