Zope 2 currently emits deprecation warnings about old-style event
methods in OFS, for example manage_afterAdd and manage_beforeDelete.

The deprecation warning states that these methods won't be called
anymore in Zope 2.11.

I would like to turn this deprecation warning into a discouraged
warning, i.e. a deprecation warning that just states that the use of
these methods is discouraged and you should use event subscribers, but
any mentioning of a Zope version where this feature will be removed goes
away. You can call it an endless deprecation warning as well.

While event subscribers are certainly nicer, I don't see any realistic
chance of refactoring all code in larger projects (like CMF and Plone)
to move to events entirely in the next months or even years.



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