I think it's all just a huge fad to be honest - the NBA goes through phases just like any business / market, and this is (I think) another one.
Soon every team will get filled with Centers and Power Forwards that can shoot, so all teams will start filling their teams with smaller and more mobile Centers and Power Forwards so they can defend said players...
The one crazy team out there will go "hey, look at all these small defenders out there...I'm going to try my luck with an old school low post big man".
Then no team in the NBA will be able to defend that guy, everybody's small and agile 6'7 & 6'9" front line will get fouled out on a daily basis, said player with average 28 PPG, and the world will say "well, this whole stretch 5 thing don't work no more, maybe the post up big wasn't a bad idea after all.."
One team does something, finds it successful. Every team changes to adjust to what that team does. Eventually all teams then end up pretty much the same...until one team says "screw this, I'm trying something different" and breaks everybody apart. Then every team looks at what they did, says "hey ill try that too" and before you know it every team has that.
NBA is all about adjustments.
That's why in my eyes, it still is (and always will be) about balance.
Have a stretch PF who can extend range to the three point line, and combine him with a powerful center who will wreak havoc in the post. C draws double teams, kicks it out to fellow PF for the open three. Defense tries to play the perimeter, PF dumps it inside to the C for an easy basket in the post.
Rinse, repeat.
The only team who's going to be able to consistently defend that is a team who has both an elite interior big man (like Hibbert) who can defend the post AND an very good mobile defensive big man (like Draymond Green) who can chase guys on the perimeter.
With the exception of Golden State, how many teams have BOTH of those things, while also still getting significant offense from their front court?
I say not many.
This is why I actually like the idea of a Kevin Love / Demarcus Cousins front line - even though I really, really, really, really don't like Kevin Love.
Those two guys combined would be one of the most difficult duo's in the NBA to defend.