Given that most people barely even know what their home router is, I suspect the percentage would be somewhere south of 1 percent. Outside of my home, I honestly cannot recall EVER seeing someone’s home using a battery backup for their internet infrastructure.
Same here. The only people I've seen that have battery backups for their home routers are fellow geeks. I even bought one and shipped it to my ~70-year-old mother...and she just doesn't want to install it. "Too complicated".
I personally do, but of course I (and probably everyone on this list) am by no means representative of the population at large in this particular area.
Same. My home office has 3 Cyberpower 2500 VA double-conversion UPS units backed by Champion transfer switches. Power goes out, and ~45 seconds later I'm running on generator power.
My local ISP runs out of power well before I do. Thankfully there's Starlink.
Short of an asteroid hitting my office, it's highly unlikely I'll ever be offline. ;)
-A