I had a C64 back in the day . Fun machine . Money was tight & they had the cheapest floppy ( but slowest ) on the market .
Even dabbles a tiny bit in 6502 assembly language . ( I had taken a little 360 assembly language in school . )
Back in the late 80's I did a lot of work at a GM plant that made ignition systems and they had CRT info displays on several of their automated lines that were run by C-64s. I think as time went on they replaced them mainly because of dwindling availability, not capability for the task.