So, I certainly missed the point of the posting.
Time changes everything ... it has been over 7+ years since the Maple was introduced:
The Maple, an Arduino-style STM32 microcontroller board, was LeafLab's first product, released in 2009. It was one of the first ARM Cortex-M3 microcontroller boards that was accessible to hobbyists and engineers outside of the embedded industry.
Wow, 7 years is a long, long time and everything changes. My point and Roger's is that Leaflabs did not utilize ST's proprietary standard peripheral library because they could not at the time.
Today, I'm sure they would have taken a less-painful road-to-market. But maybe not.
Have you guys noticed that this forum is not being recommended by Leaflabs? Cool.
You can still read the docs. The forums will remain active until August 2016, but at that point they will be converted to a static archive. Consider checking out the resources and community at www.stm32duino.com instead.