I’m not a fan of alternative packaging solutions. Never been. If it’s not in Debian’s repositories then I don’t bother with it. Some would say that’s close minded as not all packaging solutions are bad but when you use a stable distribution like Debian the native packaging solution is a lot easier to maneuver and troubleshoot than flatpaks and the like.

IPv6 torrenting for the most part goes unchecked by the companies who send threat letters to your ISP. I have a US seedbox which doesn’t have IPv4 and it’s been working great with a lot of public torrents