Beta testing a system update. Lots of improvements here. This beta has been open for quite a while, and it seems to be catching on. It's already more or less stable. I expect mass adoption with somewhat regional distribution at the 1.0 release. Of course you'll have the stragglers insisting the out-dated version was better. In comparison I find it clunky, restrictive, and demanding. Our processing power has increased in orders of magnitude; why we'd want to keep using an archaic way of doing things like this is a head scratcher.
Compatibility reasons with legacy code, and still more simple than the new beta software. Encourages further propagation of the software downstream through easier reproduction and simpler creation of child processes