Can you expand on that Bart? What is missing from Zerotier for your use?
I have both Zerotier and Tailscale accounts, I think I use Zerotier just because of it's simplicity.
I know this is covered in "etc" but it might be worth mentioning again that there are other ways than the exec node to execute OS commands.
eg there was a recent thread about executing OS commands from a function node.