Hahaha. Well, I didn't run into that issue, so it mostly "just worked" in the sense of where we had used it. I did mess around a bit with the Plone CMS that runs on top of Zope, and found it horribly slow and resource-hungry for the time. Someone must like it, it's still getting releases in 2026.
I was more traumatized by the Java-based product from Open Market (acquired from Future Tense back in the day), and all the horribleness that that entailed. Starting from XML as a template language, then seemed to get only worse. Nothing like having multiple content areas all rendered as 500 Server Error pages within one page, when it all goes sideways.
I will never recover from debugging ZODB backed by Oracle. Well, somewhat backed.
Who, like, who thought it was cool to have a pickle-based, mostly in-memory, single process, aaalmost transactional database?!