In my opinion library management should/could be a non-issue if GS chose to make it so.
This 'make work' library management project would seem the basis of BIM. How many users are doing the work that might be done by a small team @ GS in a short period of time in terms of using the update library parts to assign GUID & correct older library parts to be transferred forward easily or even, as in v12 included - but for more than a single version!
Perhaps I am missing something however the number of issues that require workarounds in this software seem to undermine any sense of efficiencies that claim to be made with each upgrade & when tech support advises against migrating GS should realize that 'Houston we have a problem'...
There are objects as far back as v4.5 that were orphaned (chaise lounge comes to mind) that seem glaringly absent yet available in international libraries so much of the work has been done - of note a dining room table is now again available in v12 after losing it from v6.5...
While ArchiCAD has many great concepts the number of suppliers objects available online for competing applications seems one of the most compelling reasons for switching - it would seem to allow one to focus on design rather than CAD technology & trying to get things to 'look right' in 3D by fiddling with migrating old libraries or spending hours making objects that one can simply download...?
Since AC 4.12 on the mac, LEED AP, certified BIM Author...