>There are distinct large latency spikes every 30ish minutes, which I think is due to the dish switching between different satellites.

The satellites are in Low Earth Orbit and zipping across the sky at an extremely high rate of speed. If you were in the middle of absolutely flat nowhere-land, you could maybe get a few minutes on a single satellite before it goes over the horizon, not 30 minutes.

Agree that it's only a few mins per satellite, but interestingly I've noticed this pause every now and then (and 30mins seems around what I've noticed) in New Zealand. The latency just spikes and sometimes connections are lost for a brief period then suddenly everything comes right again. Curious why that happens. However it's one reason why I still recommend fibre or 5G if it is availiable as both seem to be more reliable than Starlink.