Another testiment to how little people care about Windows Mobile is the fact it has taken someone this long to post about it no longer being an active platform. Okay, if you're going to be literal about it, yes it isn't "dead" but it certainly doesn't have a future and it never did.
If I had the energy, I would love to go back to quote someone from this forum who said the universal platform across multiple devices was going to step change Windows Phone' share.
I don't even think it's the lack of developer support that killed it, I think it was just too little too late from Microsoft - it didn't even offer anything different. Apple literally changed the mobile market overnight, but Google still offered a point of difference by offering a more open platform with wider hardware choices.
Nothing against Microsoft by the way, it's the exact same reason why a company the size of Samsung can't compete with Tizen, or why no one wants Samsung's content store and Milk streaming services. There's no need for more platform or services that don't offer any benefits or differentiation from what's already on the market.