There is interesting post about blockchain on medium.com - Don’t use a blockchain unless you need to
The post contains interesting arguments, although with some I can not agree. Bitcoin is used for two main reasons - hide money or drugs market? Really? Largest Czech online retailer Alza started accepting Bitcoins and I do not think that they are selling drugs :-)
Blockchain is a new and not mature technology with some flaws, but have to wait for some time until it will be more matured and adopted widely. That's why I think blockchain will unlock new innovative options that we will have to wait for.
What is your opinion?
Oh... and take a look on paragraph where Steemit is mentioned...