Blockchains themselves have a bright future though as a technology which is truly fantastic and keeps innovating rapidly. Right now, with all the negative press, it may be easy to dismiss it, but it will come back as a trustless computing platform that the world needs.
I am biased, as we chose to build in that domain but proud that we're developing actual new tech for smart contracts... YC, you can still accept us in the next batch :)
But we're building for a future where apps like Calendly can be smart contracts. With new blockchains* that have a very low tx fee (imagine $0.00001 / tx), I clearly see many services migrate to smart contracts.
They won't require any subscription, existing data is never at risk of being wiped out, and hopefully we will keep optimizing app and data size enough to get back to apps that just work, without the cruft or bad incentives. We're here to make that happen!
* New research papers suggest we can reach > 100k tx / sec with great safety and liveness properties