More and more ISP (especially here in Germany) do not provide users with an IPv4 address anymore.
There are workarounds to still make this work in Plex, I know (but they cost extra) - but after this being a know issue for over 2 years, I think it is about high time, that Plex FINALLY fixes this and properly supports this!
I know, I know… this is a complicated network issue and not a lot of Plex users suffer from it. But its more users every day (not to mention all the users who just dont realize that thats the issue and just give up on plex streaming all together!).
So please, get fixing!!