BlackLaZoR

In principle yes it does - in case of TCP based protocols, without forwarded ports incoming connections aren’t possible. In the context of the main Torrent protocol this means you can only connect to peers that have ports forwarded. This is largely solved by uTP protocol that uses UDP hole punching method to circumvent this.

So the sort answer is no this doesn’t matter unless you’re using very feature poor torrent client.

I don’t see that where I live - some ISPs offer port forwarding, some don’t. Some just give you IPv6 with ports unlocked manually in router config

Despite all the lawsuits, it’s still sailing