While I agree with you that walkthroughs/tutorials/tours, or whatever you want to call them, are not the end goal of a particular user design, the idea that you could create a design that is so elegant and perfect that it doesn't require any kind of instruction is absurd. Sure not all sites need it, but the option is out there for people who don't have the ability to hire a UX expert, and whose sites change frequently. I was literally just on Facebook and was taken through at least three different tutorials. IF you can hire a ux person to make your site not need a tutorial, then all the power to you. For the record, I founded Tutorialize (https://tutorialize.me), and I'm constantly watching this market landscape change. I've met multiple people who knew guys from Kera.io, and though I didn't get to meet them, they definitely seemed like cool dudes. I'm sure the core team with come back with something great soon enough. Peace!