Ditto. We keep sccm updated and it has been fine. The last thing that broke with an sccm upgrade was the gui button for enabling auto installs. If you had it set before you were fine. Then PMM comes out with new version eventually that fixes it. Other than that I have never seen functionality break only improve. The only thing I ever see that needs new sccm/pmm versions is operating system requirments. This feature is built into sccm so you have to wait for it to support a new os say when 10.15 comes out. Then you have to usually wait/ open a ticket to let pmm know to support that as well. It became such a mess I usually just do not use it for apps but for scripts it requires it. With scripts with mojave (until I updated sccm with 10.14 support) if My script had os requirement checkbox for all operating systems and was minimized it was fine but if the list was expanded it would not work on mojave.
