Seedbox, tor bridge, i2pd node, pihole, wireguard…there are a lot of things you can run.

Maybe your ISP uses cg-nat and you can ask them to opt-out or find and ISP with this option.

Nope, it is the same. Bittorrent have a lot more users than eMule and then you have more possibilities to find a peer with ports forwarded. 2 peers Without port forwarded can not share content.

The problem with HighID/LowID on eMule is the same on bittorrent or any other p2p, you need someone with port forwarding to upload/download content. In my case I am out of cg-nat and sharing 24/7.

Ed2k/kad network still have good health with new and old stuff

I use Adguard’s public DNS on my router for convenience, no problems at all. In the past I had pi-hole with some lists that in the end, from time to time, broke things.