The precarious state of classic software and hardware preservation

The recent discussion of the sudden disappearance of DtCyber and the various classic CDC software to run on it from the Internet has got me thinking about just how precarious so much of computer history is in. So much of what's out there online (and in person) today is at risk just vanishing if whoever maintains the archive either loses interest (lots of projects over the years succumb to this) , or rage quits (see the expungement of DtCyber and Controlfreaks from the internet), or ends up dying without having made proper arrangements (See the sad fate of the Living Computer Museum, which was killed by its new owners as soon as COVID gave them an excuse to do so) What are we, as a community, to do to fix this and make sure that our history stays peserved and isn't one bad day away from vanishing. Mike