We’re still developing our own protocol. We’ll update the TTN packet forwarder if there are minor changes to the API, but if we make major breaking changes to our protocol at some point, we might stop updating the TTN packet forwarder.
For this reason, I’d rather recommend installing Semtech-based packet forwarders if you’re aiming for low gateway maintenance. But depending on your requirements, you might still want to install the TTN packet forwarder for other reasons (e.g. if you need reliable connectivity).