Every time we support something, we've got to support it forever.
And in a large-scale system (a few hundred machines) nothing is simple.
We've looked into supporting Zope before. And no, it doesn't look hard...it's not that we couldn't figure out how to do it, it just wouldn't be worth it for how few people would use it vs. the amount of support it would generate.
Anything sufficiently complicated like this generates a fair bit of support.
Plus security, teaching tech support people everything about it, keeping the stuff up-to-date, etc, etc.
If you can install it in your homedir we probably will never notice or care that you're running it (we do generally discourage long-running processes, but if you're not dumb we'll never even notice). If we do notice we'll shut it down.
But we're not going to officially support it.