So Poser should stop trying to improve and make it easier to use other standard sources to make it more compatible? So if something is wrong and it has been wrong for a while then it should stay wrong, because someone has learned to work around the wrongness, correct? Like the fact the Spline curve does not work the same way on the lower side vs. the upper side of the timeline when you put in a Break spline. The Lower side turns into a Linear Line, while the Upper side remains a curved spline. Fixing it so it worked as Spline on both sides would allow someone to reverse the key frames and have a symmetrical movement and make it easier to animate with, but because it has been wrong it needs to remain wrong.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13