Those 5% are probably a wild collection of devices. TVs with embedded Browsers, old phones and other computers elsewhere. As example: my late grandfather of 10

Those 5% are probably a wild collection of devices. TVs with embedded Browsers, old phones and other computers elsewhere. As example: my late grandfather of 100 years took records of his stamp collection in Excel. He used the computer for Wikipedia as well, but we didn't upgrade ist as he was comfortable, but upgrading to later Windows to ruin newer browser would have been too much of a change and rather made him stop doing what brought him fun. The router etc blocked worst places frequent backups allowed restore, thus actual risk low. Anecdote aside: there are tons of those machines all over. And then another big one: bots claiming to be something which they aren't.