I have used Adguard Home before. I found it to be very similar to Pi-hole.

I never tried Technitium.

Currently I use Pi-hole with unbound.

I’m a Procrastination Wizard™, so I get it…

For old photos, you can easily have half a dozen copies on old HDDs, DVDs, cloud… a few GB maybe? How many photos can be that important?

If you bork your server, those photos are not lost, just harder to access. The Missus can still be upset, just not as much.

These tags are e-ink, so there could be monochrome pictures!

Ackshually… Stop signs are octagons!