The tau deal breaker for me is EE sinewaves, where the equation naturally uses pi, and tau is conventionally used to parameterize the function.
Prime means derivative; fʹ is the derivative of f, whereas either of f' or f’ is an abomination. (TeX permits the former abomination by, essentially, translating f' into f^\prime.)
Edit: On Mac. Trying to do that on a Kindle Fire was ... unproductive.
The tau deal breaker for me is EE sinewaves, where the equation naturally uses pi, and tau is conventionally used to parameterize the function.