As the 30 days off-load is now released I am blocking all sync and doing my work only on macOS (no big deal, as none of my iPads cope with the size of projects I am working with). The iOS environment will be for sketches and ideas manually exported and imported if needed.
(Btw, my office runs fire-drills and down-drill every third month, only working with the intranet, detecting problems and what is calling home to frequently. Preparing for a downtime.)
Update
Well… that did not turn out well…
I edited pfile, upgraded, and blocked all com [to be safe]. Shaper then deleted all older files in a silent sweep - forcing me to be dependent on the ISP/net/servers.
Returning to 5.900.0 (9124) and restoring all workspaces from backup. Our other (paid) workstations are now frozen on 5.900.0 (9124).
Update
All good, back on a well behaved version. All ‘old’ 600 (40GB) projects restored intact.
At least, the now, self-deleting-mechanism, could had identified that I had no com when I upgraded… but no.