I think PaaS demand is going to die down in the near future. The simple reason is that before, it used to be quite annoying to get a server set up, replicate it and scale it, but now with all the awesome automation tools coming out, I doubt that is going to be a problem anymore.
Nonetheless, I doubt PaaSes will disappear, they will still remain useful for hobby projects as you can see with this quote:
The free usage got less attractive,
paid hobbyist usage got more attractive.
I find it notable that the hobby-pricing-level is
competitive with DigitalOcean.