True, but it depends on how you define "working". MS has confirmed backend services (backups/restoring from backups, auto uploads, etc.) will be phased out starting early 2020. Who knows about live tiles as I'm guessing server side stuff for them will be shut down by the end of 2020. Apps are up to the developer but it's unrealistic to think they'll continue to work fine, especially since MS hasn't promised the Store will continue to work in any capacity. If a device is reset, you may be SOL to even install apps. The
FAQ spells it out well and MS isn't misleading anyone: they recommend moving to Android or iPhone. I guess if you use the phone primarily for calls/texts/emails and an app or two you'll be fine but who knows what will suddenly stop working. As someone who is still using a 950XL, it saddens me but I'm planning on switching in October/November.
Having now read that FAQ, the only thing that concerns me is the photo upload service. Manually copy over photos will be dumb.
As for security updates: meh. As a rarely used mobile platform it's far more secure than android or ios. App settings backup? Takes about an hour to set up a new rebooted OS. No big deal. Store will work, apps will work. If blackberry is anything to go by, apps may depreciate after the deadline. A few years afterwards, things might be too bleak to continue. At a guess, based on my BB OS experience, it won't be until about 2021 or something where you'll really HAVE to move on.
Personally I'm putting it off longer. I want a decent camera, and a low expense. I also want a de-googled android phone with MSFT added back in. In a few years I can pick up a refurbished device that perfectly meets those needs. Right now I have other expenses.
The beauty is, the phones being released right now, can't really be improved upon much. They are fast, have plenty of storage, and great cameras; even in the mid range. Baring some unforseen technological break through, refurbished will be fine.
I'd almost get a keytwo as a replacement, but a) google b) camera sucks. I do like the hardware keys. Still faster accuracy than touch keyboard, after many years practice.
The windows 10 mobile world won't end 2019 december. It'll be a slow decline after then. And unlike BB OS, windows 10 proper still exists, so there will probably be useable app support for many, long after when bb10 became a walking corpse. Could be still fairly useable in ten years for all I know, simply due to the cross compatibility with windows 10. I think that'll mainly depend on whether MSFT keeps the store compatible (although I guess you could side load, that'd be a pain).
*Sidenote, probably looking at the xiaomi pocophone f1. It's supported by lineageOS, so I run it totally googleless, add in microsoft launcher, cortana etc, it's cheapish and has a good camera. It'll no doubt be available refurbished in about a year. And that or something like it can be my last smartphone until smartphones die/evolve into something else. I'd actuallly love a smart feature phone funnily enough. I don't need much, maps, browser, music. Extra battery and sturdiness would be a killer. But the nokia banana phone is a t9, and has a **** camera.