A comment on another site about this was "One should be aware that for many situations it will not be a drop-in replacement due to its AGPLv3 license"... but my question is, why would that be a problem for many situations?
Doesn't the AGPL only really matter in most cases if you're making modifications to it (even when used as a web service)? It's not like it makes other non-pg code AGPL too, right?