All of this is working perfectly on the Insiders Version, no problems on any of it. It works just as well as the final clean install of Win 10 I have on another computer.
I have 2 perfectly working preview versions.
Besides, free is a very good price lol; ms is hoping cloud services and hardware and things like pay-to-view/pay-to-play and charges for tie-ins links advertising and/or patents from other vendors will replace sales of software licenses. They are also making a business out of support.
I think they are only in the consumer retail end at all for those reasons and to promote developers to write for their platforms and to keep public familiarity with their stuff high, which helps on the business side in adoption/retention rates and training costs, and also for a toehold in BYOD in the workplace.
There is no comparison between the Insider version of W10 and the fully released to the public version.
Everything appears to work on the release version whereas for example desktop apps along with other many other features do not work on the Insider version.
Obviously M$ does not want pirated versions to take full advantage of all its applications.