Just tried this on a recent Trixie amd64 install. locate isn’t installed by default, but there is a locate/stable 4.10.0-3 package and it installs just fine for me.

sudo apt update
sudo apt install locate

What number am I thinking of?

I’m using Mikrotik and Ruckus. Would recommend both. I like that they are both at the level of reliability that I don’t think about them at all for months at a time. I update quarterly or less and they require no other attention from me. They also work well with my centralized data collection and alerting via LibreNMS.

OPNSense would be high on my list of alternatives when I reevaluate next time. And all Mikrotik would be a good option for me as well. Their Wi-Fi gear is not as strong as Ruckus or Ubiquiti, but they are super solid.

The Unifi ecosystem is a bit too centralized for me. I don’t want to create an account in order to use the hardware.

Matewan (1987) is a good movie covering aspects of this story. Great cast and an engaging story. The cinematography won an Oscar.

Is it possible that you didn’t enable snapshots during installation of TW, and then turned it on later?

That seems to be a common explanation on the openSUSE forum when .snapshots is missing from fstab (found by searching for the error you are hitting). There are some threads with workarounds. Basically, mount the .snapshots subvol manually, re-try the rollback and then add .snapshots to fstab so it works in the future.