They make their money on the hardware that they sell and the ASICs in there are fairly specific to them. Opening up their software stack is hardly a big step, most companies don't do it because their products can easily be cloned by nefarious manufacturers (this is quite common in China). If you have such a secure position that no one can copy your hardware (e.g Juniper & Cisco won't), then you can do this with impunity.
If this software actually helped commoditise the high end product then I would be happy, but I doubt it will.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.