With a tiny bit of offsec you can make pretty bulletproof setup.
Work only exists inside of a Win11 VM. It never touches the underlying system! All files associated with that VM (most importantly the virtual disk) live on a separate partition, or better separate drive. That partition is not mounted in fstab. So under normal circumstances it should never be mounted. So any fuck up they do to their Linux system will leave that partition untouched. If worst comes to worst that can boot a live iso from USB and run their work VM from there.
I would trust that setup infinitely more than having windows as a base system.





Windows will break your bootloader in a few updates time. It will literally check all drives in your PC and put a windows bootloader on it, overwriting any others that are already there.