<sarcasm>
A similar thing happened to me last month. My Ubuntu server suddenly started showing a countdown, warning that my firewall was blocking Canonical's ‘essential data’ pings and threatened to revoke my apt privileges. I gave it a pass-through, but the next day, it upgraded itself to Ubuntu Galactic Cosmic and replaced all my bash scripts with PowerShell. Still getting used to the mandatory Snap packages for 'ls' and 'cat' now…
</sarcasm>