I have Tailscale (actually headscale) set up on all my devices and the performance is good enough I don’t turn it off when I’m home and on the same lan as my server. The connection is p2p so it’s just a little encryption overhead. When I travel to other networks like my mobile network, or various corp wifi networks, it continues to try to get a p2p connection. Only sometimes corporate wifi networks block p2p and the traffic round trips through my VPS. It does take a lot of load off the VPS compared to the old way with openVPN. It also continues to work “for a while” if the VPS is down.