have you given long-time compability of extensions some thought?
I mean the case: a well used extension no longer is maintained - what happens then? Will it just be not-compatible at some point - or what will happen?
I have in mind e.g. dokwiki software - which i use. There are several extension which a lot of people (non programmmers) use - but then got abondoned by the developer. The most used got "pooled" in a low maintainance form and kept compatible/secure - but dont get updates/new features.
As a compact core might come with this problems have you had anything in mind for these situations?