To be honest, we can’t be sure of that. The only thing you can be sure of is that an online game WILL change and that can include addition or removal of features and systems.
I would be very very sad. Although as long as they phase it out like the other shelved systems I am ok with it. Their method is not to remove what we had, but just not to add much new to it. Except First Aid, that is gone. We can still do Archeology in old zones and get the rewards/achievements. We can still use pets for battles, old content will still exist, and some new pets will still be able to battle in Midnight. It is not going away, although it is changing some. Feedback: Pet Battles
Honestly, most online games don’t last 7 years so if Housing lasts that long it will be longer than many online games exist for. I would call that a good run. I do think it will be very very popular and likely continue to be used long after people are “retired” from raiding. There is a huge audience that loves cozy games and cozy gameplay styles.