Take it from the other direction: What could you have chosen in 1989 that wouldn't seem ridiculous today? How many OS releases from 30 years ago still have com

Take it from the other direction: What could you have chosen in 1989 that wouldn't seem ridiculous today? How many OS releases from 30 years ago still have commercial support? How many OS releases from today can still run a binary from 30 years ago? Will the 30 y/o toolchain still work? Will the most recent release of the toolchain be able to compile 30 y/o code? Do you still have all of that 30 y/o code? Are there other dependencies? Can it run on modern hardware or is it readily emulated / virtualized? Is talent with the necessary experience still available in the workforce? Looking back is pretty bleak and I don't think it's any better looking ahead. Technology is a liability.