My two cents here: What the company's plans and structure has to do with the device is that the device and the company are linked. If one fails, the other will lose most if not all usability and/or satisfaction. If you bought a BB right now, sure it will work and it will have everything but I doubt you would be able to enjoy it all very long. Unless you just want to use BB for a year or less then by all means go for it. And for the google thing, I thought it was the opposite, since motorola was dying people were like dont buy it. Then google took over and rumors of moto x started to thrive and people were filled with excitement and curiosity. At least from what i've read.
To your question though I'd say get an android or any of the other top OS. iOS, Android, etc. People love ios and android because the user experience is fresh and constant. People tend to buy something they think will last them for a long time. no one thinks apple and google will go under in a year or two. For BB in my opinion is TOO unpredictable at this moment. IF they go under then what you have is a device that will no longer be supported officially. That means you are at risk with security breaches, device will get slower due to lack of efficiency updates to the device, and so on and so on. If they dont go under then you still don't get a full user experience (app wise) as the others. Developers will go to the most popular of them all. That means apps will go to where ever the developers go. BB is not that appealing to an average developer. There's not much revenue. So BB already has a lack of apps as someone stated above. If you want something that just works with little customization then go with iOS, if you want slightly less quality app selection but with more customization go with android. But it all boils down to what you want. If you REALLY love BB then just do it. Get what you love.