I'll defend ebbv
I have no intention of migrating V1 apps to V2 - it would be a waste of time and money.
And until I see real world examples of V2 performance or adoption, I'll continue to use V1 due to the incredible amount of 3rd party code that works with it - which I'm assuming, is alllll gonna need to be re-written to work with V2.
What if PHP 7 broke all backwards compatibility with PHP 5 unless hacks were used. The world would be un an uproar (if not all the Wordpress devs out there)
I was late to adopt V1 - I'll be late to adopt V2.