Just remember that DelphiX is not open source and Hori has not given any permission to anyone to make chnages to the code.

While propbably not an issue this does mean that the new undelphiX with hardware optimisations is effectivly using pirated copyrighted code.
In principle you are correct. However, I do agree with WILL on this. Jaro (and others) have continued where Hori has stopped. Without them, DelphiX would have been dead a long time ago.
I can't say this for sure of course, but if I would be Hori, I'd be very grateful that someone has taken the time and effort to bright DelphiX to where it is now.

On the other hand, its easy talking afterwards, when all the good things have been done.