Skysafari + Nexus is a good solution for those of us with old, non-GoTo, encoder-equipped mounts.
The Skysafari folks have also stated that they can look into a multi-star modeling algorithm instead of the current two-star (for the next version). This would put their pointing algorithm on a par with Argo Navis and improve pointing accuracy.
It does not address the issue of automation though.
I think supporting existing mounts is not a problem, so long as the mount communicates via a well-known protocol over serial or IP.
It's the cameras which are the issue. The good news is I found some old code for the QHY8 and passed it to the developer of CCD - https://sourceforge.net/projects/cccd/
- (who also wrote Lin_Guider).
Since there are so many projects out there scratching various itches, one has to choose one. Anat chose to support CCD, Lin_Guider, INDI, and astrometry.net for his stand-alone controller solution based on an Android mini-PC.
since he spent 3 years working on that (and he has a Ph.D.!) i won't duplicate the work - all I've done is work towards support for my camera in CCD. Eventually other cameras may be supported.. I know if I get another camera I would also work towards having it supported in CCD.