If I'm not mistaken you can also install openwrt on those devices, I don't know if they come with other custom firmware out of the box. About the type of VPN, wireguard is much faster and easier to configure than OpenVPN, but yes, both are good ;)

The idea is that each user takes his necessary hardware and installs a suitable OS that allows many configurations and upgrades and personally I think there is more variety in MikroTik than in GL.inet:

https://mikrotik.com/products https://store-eu.gl-inet.com/en-jp/collections

I would very much like to do more testing with other hardware.

We continue to contribute ;)