New Version: 2015.06.17

[debrouxl]

By using Qt, HP already chose the right technology to make the computer software related to the Prime portable. Now it "only" needs to be made portable for real, like libhpcalcs was from pretty much day 1 (thanks to using a portable library), nearly 21 months ago.
Many bonus points for making the communication layer interoperable, open source, under a permissive license.

However, allocating extra developer time and hardware resources is a business / management decision...
Targeting minority platforms (MacOS X, even more Linux / FreeBSD / other computer OS) or popular platforms which have represented a minority of new sales in many countries for a while and whose stewardship imposes various annoying impediments and artificial restrictions to developers (iOS) may arguably not be a priority for business.
The existing developers clearly already have much work fixing bugs and expanding features for the existing platforms, as well as helping end users (something neither Casio staff, nor TI staff does) on this message board (mostly), don't they ?