for any roaming laptop i work with, i always install veeam agent for bare metal backups.
they connect over vpn to the awesome, free windows 2019 hyper-v edition server using REFS.
those server(s) are running veeam backup and replication.
it is the server that runs rcloner.exe and copies the veeam backup files to cloud.
one cool feature with veeam is instant recovery so if someones laptop dies.
i click a few buttons on the server and those backup files boot up instantly in a vm.
having a dead laptop somewhere else, where i cannot fix it, assuming it cannot be fixed is a nightmare.
also applies if the laptop is stolen or hit with ransomware.
then i have that owner of that laptop rdp into that vm.
as for VSS, weird issues is an understatement.
at first, i used temporary snapshots, but ran into issues on window server versus windows desktop vs windows updates versus different versions of vshadow.exe and so on.
in the end, i create a permanent snapshot, backup the files from that and then delete that permanent snapshot.
that has been rock stable for me.
i have a wiki about it which might be of use to you. tho it needs to be updated to document permanent snapshot
i wrote about it at https://forum.rclone.org/t/i-want-to-share-how-to-enable-vss-for-rclone/11644