OP here, and yeah... You nailed it. Absolutely nothing can be presumed about home networks. Most folks seem to think that because their phone shows a good WiFi

OP here, and yeah... You nailed it. Absolutely nothing can be presumed about home networks. Most folks seem to think that because their phone shows a good WiFi signal and apps appear to work that all is good. The stuff we ran into in the suburbs of a major US manufacturing center... Oof. I very quickly learned that a LOT of people really don't have much in the way of internet access at home. Some other stories: - The person who complains that a Windows 10 upgrade broke their application and they can no longer work. Real problem? Their home network connection was 2mbit symmetric DSL and the database they were working on would time out sending large results back to them. They seemed embarrassed by their connectivity and concerned about their job due to their internet access. After I managed to find out the real bandwidth and repro the problem, the site was fixed to work on low bandwidth and all was good. - Users presuming that data on their work-provided mobile phone was unlimited. They'd use it for work, but also their kids' school-from-home, and whatever video streaming... And when you try to push a few hundred GB a month through a mobile, it gets throttled. Key here was when they finally mentioned that they "have bought two other phones but they all have the problem too" as I was able to figure out what was going on. - Then the guy who was working from "home" but after a lot of digging I saw him VPN'ing from southwest Asia. Guy, I don't care that you hurried back to your home country when COVID hit so you could be with your family. Please just be honest with me when I'm trying to help you get working, because we have solutions for this too. (Eg: Remote work via virtualized desktop instead of trying to load big CAD models locally.) Hell, the number of sysadmin-type IT folks who are double or triple NATing, with bargain-basement "range extenders" in every room of their house, who then exclaim BUT I AM NOT A NETWORK PERSON when I suggest that is why their wireless at home flaps like crazy is unbelievable. Or probably not for you. ;)