The end is nigh.

I've got an existing Arch64 install, with win10. EFI, systemd-boot. From the looks of /boot, it seems that another linux install on the same ESP would try and overwrite the existing vmlinuz etc files ...

The distro in question is Proxmox though that likely isn’t a factor. It’s straightforward to start the systemd unit that fires up console on /dev/ttyUSB0 and connect to it, log in, etc…. But I don’t ...