P to P is potentially laggier, especially in farther-flung areas. It’s less secure, since the server is someone’s machine. So it’s easier for cheaters to do their thing. You also need to run a whole server alongside the client, so you need to leave a reasonable amount of perf overhead on your recommended machine that you could otherwise dedicate to just running the client.

That said, it’s cheaper to run and easier to maintain at EoL. So tradeoffs.