Best way to deal with Aperture Libraries now.

I have an iMac on Mojave & harddrive with Aplibraries on it. I have a Mini with Lightroom Classic and am transitioning to it with newer photos and maybe some specific Aplibraries. I do have Avalanche.

What I would like to do is [for less important aplibraries] keep the final image [ie the original as edited and now Version 2 or whatever] = I don't need the original to then deal with again - the 'final' is fine. So do I go ahead and export all the 'final' versions [do they lose keywords? and titles?] or is converting via Avalanche to LRC or just importing into Photos best == we are talking about quite a few libraries = Not all that important but don't yet want to trash. I do have a lot of duplicate libraries so would like to join/merge them first, I guess.