Those of us working on apps, websites, etc, need to remember that there are lots of people out there that are not connected to the fast Wi-Fi or fibre connections we have.

Here in the UK, some networks started shutting down 3G. Some have 2G as a low energy fall back, but we're supposed to use 4G/5G now. The problem is that 4G is not available everywhere yet, some areas until recently only had good 3G signal. So I've been dropping to 2G/EDGE more often than I'd like and a lot of stuff just stops working. A lot of apps are just not tested on slow, high latency, high package loss scenarios.