I tried learning it years ago but quickly decided that I'd rather not and learned DOS, Linux, & Ubuntu instead. (Most of which I've since forgotten). Ubuntu saved me after a nasty data hostage situation on my laptop followed a foolish mistake on my part. DOS is always handy in certain situations, but they happen so infrequently now that I just don't remember them well enough anymore.

In any case, I still recall the endless waiting for IT to write new code for the main frame computer in a manufacturing business I worked for as a Junior Industrial Engineer. We were trying to implement a computerized system in the manufacturing unit so that we could computerized the payroll insteadbof having 3 - 4 people doing piece work payroll by hand. Our new program would have allowed it to be done by one person, releasing the other three to do other office functions that needed help.

It took the IT department so damn long to just barely get a partial functioning that we ditched a year's worth of work on it in favoring of buying Microsoft computers (using DOS, windows was a year away), hiring techs to create the base of the program, then using Access to build our database that could interface with the base program. The whole thing was done in 7 months.

That was years ago when you could readily find someone well versed in COBOL and it still took forever to get so little functional code written to work with the system already operating there.