The next question about the cassette loading computers from the 80's?

by now it's obvious that computers in the 1980's could save files onto an audio cassette. but if i had a tape copier system could i mass produce my software with it?

either a hi speed dubbing tape deck, or a full blown copier system, with a master well, and like 20 or so copy wells.

The next question about the cassette loading computers from the 80's?computer repair

I am sure that's how they would have done it in the 80's... possibly subject to quality issues as some multi-cassette copiers available are cr*p quality even though they are ridiculously expensive.... You would have to get a commercial copying system for which you might have to sell at least two of your limbs, and possibly both kidneys - think carefully which two limbs you least need...

The next question about the cassette loading computers from the 80's?free antivirus

I like your thinking, trying to re-use old technology for something new but, it would be much easier and faster to write code to do the same thing and burn to a CD-ROM disk.
The problem with high speed copying to a tape is static producing 'snaps' on the tape. Tape systems were in specially controlled computer rooms where humidity and temperature were controlled, not just for computer cooling purposes, but to reduce the risk of static electricity ruining the tapes. Also, audio tape systems stored the data in mono format so you would have to make sure you could master the tapes in mono anyways. The other major drawback was large programs require very large tape storage. Audio cassettes were typically used for programs under 1 Meg.
You could but I dont know what purpose it would serve you! No one else could use them!