I understand, but we still have something which is much better than nothing. One of the big plus of KaOS on top of illumos (even if we use the same tools that openindiana uses for example, the same one for system installer or package management) would be the desktop environment (KDE Plasma), which is very customizable, desktop/user-friendly and modern. Openindiana has come a long way and is singlehandedly improving on top of illumos, even if their tools aren't great, they are progressing with what they have and are improving it.
If KaOS really wants to embrace illumos seriously, we need to start with what we have and improve with what we have instead of waiting in the sidelines and contribute to illumos, and I am sure that our DE itself would be a huge improvement compared to something like openindiana which uses an old version of MATE I think, but MATE in general is not that great and KDE Plasma is so much better.
So technically, we do have the fundemental tools needed for an alpha version of KaOS on top of illumos, I sincerely hope @demm you can kindly consider it, let's not wait any longer and let's start making the change today, every bit helps.