Oil Change Regularity

I fly my bird about 50 hours per year. I was taught by an old-timer
that 50 hours was fine for oil changes and that a year was an
acceptable calendar period.

In the other threads it seems many have a higher frequency than this.
Would people chime in with how often calendar and flight time they
change? For those who have what I'll call "short duration changes"
based on what's above, what are the things you worry about happening
if you go longer. Anyone who goes longer please also give your
philosophy.

Thanks,
z