Considering I read on it every single day and reading is about my main hobby, its worth it for me. Do I have to save up for stuff like that? Of course. I drive an old Kia and can't afford a house. So its got nothing to do with that. I save up gift cards and shopping points for my kindle devices. Have done so since I bought my first the K1. And that one cost me more than the Oasis.
Its all a matter what you spend money on. I don't collect shoes, I carry the same purse for years and years, I don't buy expensive makeup. Its called budgeting.
I would not have been able to order the Oasis if I hadn't had the points saved up. You know, pay all bills with a card with a nice cash back and then pay off each month. Save up the points for shiny gadgets.
I seem to have enough each year for 1-2 gadgets, depending on the price. Mostly kindle gadgets.
It comes down to what you need. I can't read on a phone or tablet screen, so I must have a e-ink device. Its not an option, its a must. I must have buttons so my hands don't hurt so bad. And it seems I must have real buttons as even the haptics are hurting my hands as its hard to grip and press at the same time.