Hmm, it does have one ultimate cost advantage over it's commercial rivals , and being an age where margins between profit and loss on the sale of all mobile devices are razor thin , and tit for tat warfare between the makers is pretty vicious.
With the commercial rivals the usefulness and continuing security comes at a steep price set by the software supplier which in turn can make the difference between profit and loss for the first generation machines as the rivals play catch up and run past at the same time !
Open Source on the other hand means , security is more stringent , bug fixes done faster , and functionality can increment by degrees as required !
Or , I suppose one can behave like Apple , sell the product at a premium price plus big margin and then bind the user to the crappiest Telcom and lousiest conditions they can find ! If the user finds a loophole in their poorly designed and executed proprietary software they may get get a security update some day or may be not as the case may be as the priorities are moved like a pack of playing cards either on a whim , but mainly driven by maximum profit at the highest cost to the end user!
An interesting conundrum indeed , smart astute geek end users fixing the myriad of software problems for you for free with useful additional add ons , or paying the licence fee up front and then per unit ! The promised new additions in the pipeline may or may not appear , and just maybe some of the inbuilt security bugs may be fixed at some time in the distant future , or new ones added !