I suspect they’re multiplying all of the 1-in-X probabilities, and if they come up with less than 1-in-8 billion, then they call that unique. If they were actually comparing your values against a hash of previous visitors, then the second time you visit, you’d no longer be unique.

eta: screen size and various hardware measures are probably the lowest probability fingerprints, but they’re all highly correlated - there’s a few million Pixel 7’s out there, but you’ve probably got like 1-in-1000 screen size and a couple other 1-in-500+ hardware, and that would push you to “1-in-billions,” even though there’s millions of people with the same fingerprint.

In US metros, they’re typically around 2% of the home value, with discount maybe 50% for owner’s primary residence. Depending on the locality, the home value may be reappraised every year only only after a sale. If you bought a $100k house, planning retirement on $1000 annual taxes, and the area gentrifies your house to $500k, the extra $4k/year in taxes can be a budget buster.

My first server was a single-core Pentium - maybe even 486 - desktop I got from university surplus. That started a train of upgrading my server to the old desktop every 5-or-so years, which meant the server was typically 5-10 years old. The last system was pretty power-hungry, though, so the latest upgrade was an N100/16 GB/120 GB system SSD.

I have hopes that the N100 will last 10 years, but I’m at the point where it wouldn’t be awful to add a low-cost, low-power computer to my tech upgrade cycle. Old hardware is definitely a great way to start a self-hosting journey.