Frankly (and I have all of Stevens' TCPIP books here) IPv6 couldn't be lower on my list. We're still on IP-beta (aka v4) in 2023 and the migration was supposed to be completed by 2010. Like FM radio, it's here to stay.
As a community, we need developers. People to back the work of Paul, David, the folks at BWW, etc. The very first thing new developers want is a friendly development environment.
On ArcaOS it is sort-of there. At least there's ANPM/yum for dependencies management. There should be a single 'awesome ArcaOS' git(Hub,lab) with everything you need to get up to speed with a tested stable development kit. That means OpenWatcom 1.9 and gccand all the environment scripts sorted out and standardized, a modern editor... and I know someone can take a few hours to set up by themselves. Bullshit. It's just yack shaving and non-productive. I want Suntan Special for developers.
Once that is in place, a developer community can actually get started to support ArcaNoae, bww and Paul on Qt6, blink/chromium, KDE apps (thanks qt6) and only then - maybe - gtk apps.
But I tell you the developer experience is currently very opaque, cumbersome and error-prone.
Since the most urgent need is on C/C++ side, I obviously wasn't talking about REXX development.