Ephemerality is the only workable solution to mission drift in an organization.
The vast majority of entrepreneurs don't set out to create surveillance capitalism[1] or enslave children[2], but over time the pressures of keeping the business alive and growing force you to make compromises. The compromises are small, but each one takes you farther and farther from your values. Eventually you end up doing things that are abhorrent to any normal person, but seem normal to you because they're not that different from the thing you did before. This happens with all kinds of organizations including nonprofits, churches, etc.
One of the things I've observed in the success of organizations such as 12-step groups, is that they have principles which they can and do "die" for--rules like "We would rather dissolve the group than do X". Groups in a 12-step program are autonomous--they follow certain principles (traditions) and often groups die off rather than break tradition. Similarly, impermanence is a core feature of Temporary Autonomous Zones (TAZs)[3] which allows it to avoid perversion of its ideals.
I think ephemerality is a good idea for businesses, as I think it's a key step in the direction of making capitalism more ethical. Businesses which can't operate ethically should fail, and our society should have safety nets for dealing with that (and other reasons a business should fail). But that's such a fundamental shift in thinking about business. Half of HN seems to think that if a company is making money it must be because they're good, despite extraordinary evidence to the contrary so we have to keep letting those businesses do what they're doing, without any regulation. I'm not sure how we can get to a future where businesses behave ethically when the unethical businesses have successfully sold the idea that their success can only have been achieved ethically, as a rule of economics.
[1] https://en.wikipedia.org/wiki/Surveillance_capitalism
[2] https://www.theguardian.com/global-development/2021/feb/12/m...
[3] https://en.wikipedia.org/wiki/Temporary_Autonomous_Zone