Thanks for this. I followed the steps and it failed to unmount the current "core" mount for snapd because the target was busy. What helped me was to unmount it

Thanks for this. I followed the steps and it failed to unmount the current "core" mount for snapd because the target was busy. What helped me was to unmount it lazily by running 'sudo umount -l /snap/core/xxxx' and then purging the package. That helped things move along. Just in case someone runs into this issue.