I don't agree with his sentiment at all. With OpenVPN Viscosity is by far the best OpenVPN client and both the 'official' client (OpenVPN) and the open source alternative (Tunnelblick) are buggy and have crappy UI. I'm hoping Sparklabs either repurpose Viscosity to include WireGuard as well, or write a new client specifically for WireGuard (which I'd happily buy).
Edit: wow, what the hell. I guess HN hates improved clients with a violent passion.