Our story with /e/ is that we decided that it would make more sense to invest some cash in /e/ (we did it) than try to maintain NayuOS now that most ChromeOS users expect to run Android apps (and this part is not in ChromiumOS AFAIK).
Also, we observed a growing need for some kind of "desktop OS" for industrial applications (robotics, industrial automation) that does not depend on Google APIs (factories are often in China or do not have Internet access).
It's funny. At the company I work for we have a system of record that, while built on completely different tech, reminds me of Zope a lot. I guess the problems both platforms try to solve are so similar we see convergent evolution.