On exporting designs

As it stands the main function of Xd is to get your client to sign off on a design approach. That will sometimes even mean that you're using ways of doing things that will need to be done in a different way in the real development tool. For example, I doubt that Xcode would do repeating grids in the same way, and the real page would need to work with some sort of CMS to get the actual text and images.

If you still have Muse installed that's one way to prototype in a tool that gives you code that could be used, although developers I know tend to not trust generated code. It also would only be good for saving time on web pages, I don't think it would help with creating a native mobile app.

Without something like Xd your developers would need to program a prototype, make changes based on feedback, and eventually perhaps will be able to reuse some of the techniques used in the prototype. I think that would take more time than if you used Xd to get to the signed off stage, and then the developer has to recreate the approved design.

Having said all that, notice how there has been an update in the middle of each month, and the next middle of the month will be during the Adobe MAX conference. It may be a good time to be optimistic! Also, look through Uservoice, and vote for items like this one:

Export whole artboards (or entire project) as HTML – Adobe XD Feedback : Feature Requests & Bugs

Note how that one is marked as "feature under review".