It would mean anyone wanting to build CongoMongo from source would
need to have lein2 installed, but it wouldn't affect the _use_ of
CongoMongo in other projects. So contributors would be affected but
not end users.
FWIW, I'm with you on waiting for a final 2.0 release since we have a
team of contributors that would be affected - unless everyone is
already using lein2 for some things?
OTOH, I've updated clj-time to use lein2 already because there's
really only me maintaining it. At World Singles, we're still on lein1
because we rely on the lib/ folder being populated by dependency
resolution. I'm working on a script to use lein2 classpath to satisfy
our needs but this is an important change to be aware of between lein1
and lein2.