disclaimer: I'm a maintainer on Crossplane.

OAM is an optional feature of crossplane - you don't have to use it if you don't want to

Good to know, at least that warm me up to crossplane further. The messaging might need update, including within the docs. I mean - crossplane is the OAM implement - coupled with OAM sprinkled all over docs, gave me very different impression.

This aside, I think crossplane work is interesting.