VLC ships their own codecs which is great on Windows, but a bit suboptimal on a typical Linux desktop installation since you’re probably going to have GStreamer or ffmpeg available too for the rest of the software like video editors, web browsers, etc

IPv6. Lack of IPv4 addresses it’s a problem, specially in poorer countries. But still lots of servers and ISPs don’t support it natively. And what is worse. Lots of sysadmins don’t want to learn it.