That response made me look through my most used apps. For all the doom and gloom on the forums, most basic things that I rely on can be expected to keep working well.
My most used apps:
Built-in/Microsoft, not going anywhere:
Edge (MS)
Outlook (MS)
Phone (MS)
Messages (MS)
Photos (MS)
Camera (MS)
Weather (MS)
Calendar (MS)
File explorer, OneDrive, Office (MS)
UWP apps, here to stay:
Spotify (UWP)
mTalk (UWP)
Twitter (UWP)
Share To Speech (UWP)
Package Tracker (UWP)
NextGen reader (WP8 for now, UWP Desktop only atm, unlikely to leave)
Other apps, status uncertain:
WhatsApp (Facebook. They already have a Windows App, so UWP later seems likely)
Waze (abandoned, not likely to stay/improve)
Podcast Lounge (abandoned?)
Stacks for Instapaper (abandoned)
So out of my most used apps, Waze getting fully killed is most likely to hurt. Otherwise I'm pretty much OK.
Now if MS could please stop breaking basic functionality with each update <lumbergh> that would be great. </lumbergh>