Earlier quoted context omitted.
On the 2 SIM cards I have (Vodafone NL and KPN NL) they don't throttle, as that's illegal, but the plans have data limits (after the limit they just disable 4G for you) and perhaps they do some QoS though. Public WiFi I mainly use Dutch railways (NS) in trains which uses T-Mobile NL. You (or well, anyone, AFAIK) cannot use that to watch on-demand movies though. But I just have that kind of material synced up locally.…
In my experience, there are actually networks that throttle certain kinds of traffic. For example, on the WiFi on Blauwnet trains I can connect to my OpenVPN server but WireGuard just doesn't seem to make it through. I assume this is because of a combination of unknown ports + UDP + uncommon protocols. I think the trick to bypass this kind of nonsense is to use port 443/1194/53 so QoS + firewall rules will still allo…
Should still be possible. Xs4all had port 80 set up so that if you'd SSH to it, you'd get connected to their shell while with a browser (the normal modus operandi) you'd end up on their website. It worked very well in some of the more oppressive regimes where traffic to port 22 was blocked.
I also don't serve HTTP(S) content on my home connection. I only host WireGuard, that's part of the point.