When I read stories like this about cool technology from the past that people can still enjoy today, I think it's a pity that the source code is locked away and lost as people and companies move on to new things.
IMO, there should be some kind of archive that conserves and publishes them after some time has passed, so that they could be ported to new hardware and kept accessible. and somehow documented for future historians.
Re-releasing old games on new systems is pretty common. Crash Bandicoot got re-released on the PS4 for example. So companies are going to hold onto their assets in hopes of being able to cash in on them again.
Not all of them even have it. Once everyone moves on from a project unless the company has an archivist that stuff tends to get thrown away or forgotten about in some dusty drawer in some box of DAT tapes that everyone forgot about. I would say it would be around the very late 90s that companies started realizing they should hold onto that stuff. Even then...
IMO, there should be some kind of archive that conserves and publishes them after some time has passed, so that they could be ported to new hardware and kept accessible. and somehow documented for future historians.