> Well, this is a network where only SSH and one or two more TCP ports are open, and it's not something I can "get fixed".
Are the other TCP ports, as well as UDP blocked by a force of nature? :)
> Still, I do not have any practical reason for switching to Wireguard, as I do not really see any reduced speed - it is possible that the bandwidth limitation of this network's internet connection is low enough for that to be the bottleneck, instead of OpenVPN. :)
At lower throughput networks, you don't need wireguard. It'll still mean fewer CPU resources used, much simpler configuration, and things OpenVPN and the likes just cannot do (such as maintain the connection despite both ends changing IP, as long as it doesn't happen simultaneously).