This is a user forum so no one can know. Anyone that does know can't and won't say. Adobe, some time ago, went on record that their plans were to continue LR as a standalone program. That statements has not been confirmed recently, but it has not been denied either.
If you have a version you like, keep using it.
Lightroom standalone application being discontinued?
Well, as of now there's no information about it.
Well, I guess it became official 19Oct17- Standalone is dead, there will be no Lightroom 7. I just want Adobe to know how hurtful and frustrating this is for amateur photographers like me. I entered the Adobe world when I was teacher, using it's creative suites to help make my lessons. I didn't need to use it weekly, so I could never justify dishing out money on a subscription. Nor could I pile up the work till I had enough to justify subscribing for just one month. No longer a teacher but I still love the intuitiveness of your products. I use camera raw in bridge almost exclusively, rarely do I need to go further and open up Photoshop. That said I still only use camera raw on average 1.5 times / month. Still not enough to justify the 9.99/mo price for Lightroom CC. I have been waiting for a year to hope to that Adobe would release at least one more... Now I am priced out of yet another thing. This trend of subscription service is horrible.