Requires UDP, not all providers allow that, especially hotspots and places such as hotels that try to block gaming/video and such.
Potentially just ignorance, I’m aware of wirefuard and I use their client for my MacBooks but I haven’t taken time to investigate any of the differences, pros, or cons. Will do that now, thank you for prompting me!
Not sure what you mean - mullvad supports using wireguard?
Not sure what you mean - he never implied that mullvad didn't support wireguard. He was asking why the original commenter used OpenVPN over wireguard.