How often do you actually test your backups?

Moving from shared hosting to a VPS was the best decision for my sites.

Learned the hard way that an untested backup is a Schrödinger backup.

I put every site behind the same free CDN tier and forgot about DDoS worries.

My monitoring setup alerts me within a minute of downtime and costs nothing.

I did a bit of searching but could not find a recent thread on this, so here we go.

Curious what everyone else here thinks about it.