Such decisions are already a prevailing trend. Take the same Ethereum. Buterin also plans to move away from classic mining in a similar decision.
He already wants to implement it in the spring of 2018. But all as they with developers cannot realize it, since the network is already formed and has its own characteristics. There ERC20 technology and not POS. that's the whole complexity.
hahaha) reading this post you understand that you do not understand cryptocurrency at all. Or is it your style of writing confusion?

She's a girl, she has a discount)))) maybe even a blonde !!!!
No offense Natalia.
To be honest, I also do not know how the cryptocurrency works at all. I just learn. If you wrote what is the difference, at least in 2 sentences, I would be grateful to you.