Eventually you will want to cut metal for a project or some other application. A hacksaw, grinder, even O/A get old and labor intensive quickly. Never used a metal bandsaw so can't comment on that.

A plasma cutter is like a magic wand that cuts a thin kerf through all metals. It is fast, much cooler than O/A, has a fine cut, can cut circles, arcs, straight, angles, whatever you want with ease.

I used O/A for 30 years but when the price of the plasma cutters (at Everlast) dropped to less than $1K the process was tried. I'll never go back. O/A is now used for heating and bending. Everything is cut with the plasma.