AIAB is doing goog job, but personal opinoin of mine is: I don't wanna use WB replacements. I don't wanna have in my amiga Windows style task bar.
That last one is biggest poin, ofcource I can turn it off
About amiga forever, not that well conficured as AIAB, not a worth of money. datatypes etc....
I don't have any experiment about Amiga OS XL, just hope it's not one of those "get all money what you can get" things, like Amiga forever is.
I like to make my WB myself, ofcouse AIAB gives those who don't have needed knowledke to easy way get nice looking WB.