I'm personally slow to migrate to new technology, so Adobe has already long since supported any model camera I buy. It would be interesting to hear from someone who has purchased a model before it is officially supported by Adobe, but that uses an existing RAW format, and what their experiences were when attempting to open those files in LR or PS.
I recently purchased the Sony a7r, Adobe PS CC & LR CC would not open the files initially, it took about 2 weeks after the Camera release before Adobe 5.3 release candidate became available, that's the initial Beta release of what we now have as an official 5.3 release.
Even Sony, to my knowledge, don't have a full-blown set of software to handle RAW files from the a7r, they have on their web site a very very basic set of software to open files, but it doesn't allow conversion to another format i.e.. RAW to DNG or TIFF.
This is one of the issues that have a lot of people upset with Adobe & the new Creative Cloud offering (PS CC & LR CC), if you don't take on the rental programme, at some point your stand alone software (LR4 & CS6 etc etc) may not receive the upgrades that allow you to open New Camera Files, as I initially found with the a7r RAW Files.
On the a7r as well, Sony do not supply the Camera with any software, no CD etc, your pretty well on your own, poor support in my view from Sony.