Igneel PrimeTbf in the long run p2p might just be extremely efficient. The quality might be lacking now but as time moves on and people's internet improves that can improve the game's stability at least to a certain point without FDev having to imvest a dime. Right now it seems like a shitty choice but at this right it might be entirely different and subscription models for servers might not be worth it anymore. It's a risky move but might keep the game going for a good bit longer than expected.
If you compare it to the stability we had around the start, you'll see that the P2P networking FDev uses has significantly improved.
It was very wonky during the early days.