Breakers wear. A breaker that has tripped repeatedly over the years develops a weakened trip mechanism and eventually starts tripping under normal load, or worse, stops tripping when it should. Both are replacement conditions.
The important part is matching the breaker to the panel. Breakers are listed for use in specific panels, and a physically compatible breaker from another manufacturer is not automatically a listed one. In older Ocala panels this matters more than usual, because the aftermarket is full of classified breakers of varying quality and the panel bus is often the weak point.
If a breaker is tripping repeatedly, replacing it without finding out why is a mistake. The breaker is doing its job. The circuit behind it is what needs looking at.
Technician insight
A breaker that is warm to the touch under normal load has a loose connection at the bus or the lug. That is a fire risk, not a nuisance.