That's a fair statement. I'll note that many companies are doing this
exact same evaluation, it's a well-trodden path. The first several
overlays released in OpenLDAP 2.3 were commissioned by Hewlett-Packard to
provide the features they needed to allow their own migration off Sun
servers to OpenLDAP. Ultimately when someone is sufficiently motivated,
whatever is desired will get implemented. (HP transitioned their entire
internal global IT off of SunDS to OpenLDAP a year or so ago. In their
case, they specified exactly what server/features they wanted, and that's
what they got.)