Earlier quoted context omitted.
It's worth noting that technically London uses GMT for 5 months and BST for 7 months. The GMT offset is zero, but it's important to note the difference especially when configuring servers to avoid nasty daylight savings surprises kicking in at at end of March. There has been talk of moving to a +1 offset all year round for lighter evenings in winter, albeit at the cost of some very dark morning, but given we couldn't…
I think you mean complaining about metrication 50 years later :-) The counterpoint is that without the metric system how could we make snarky comments on US-based woodworking videos?
The law requiring metric didn't actually come into force until 2000, these cases were early 2000s. Note that the law to this day still allows for imperial measurements to also be displayed, but they wanted to display in solely imperial.
https://en.wikipedia.org/wiki/Metric_Martyrs
The situation another 20 years later is rosier, even the boomers have spent most their adulthood with metric, and they're dying off now.