I think PoS is inevitable and as the kinks in the system get worked out it will eventually become the standard in cryptocurrency. That might take a while though. But theoretically it's clearly superior in my opinion. It's even more so likely when you consider the state of PoW now with the problems that have arisen from mining pools. It makes PoS look like a better option without even having to really reach very far.
If the main argument against PoS comes down to the fact that someone could borrow the majority of the coins and attack the network, then that's pretty weak considering it relies something that stakeholders can control - lending their coins. Compare it with the same type of attack on PoW, where a malicious entity gaining majority control over the network is not something any coin holder as control over.
PoW is great for the time period where we don't have the technology to deploy a robust PoS system. Are we still in that time period? Maybe. But it's doubtful that the market will allow an inefficiency like that to last forever.
I agree with those points. The Main, Main, problem is, the distribution of purely PoS coins. No matter how I look at it, even if they distributed to 100,000 people, it's still unfair, simply because everyone else didnt get in on time and gets nothing, unlike PoW, where you can always mine and get coins yourself.
I don't mine coins so I don't really see how PoW is more fair. Yes, I could buy hash from a 3rd party. But I could also buy coins from an IPO. What's the difference? I just don't see what's inherently unfair about it. People risk their capital just like they risk their capital mining through hardware and power costs. It's almost like arguing that capitalism is unfair. It's not like you can't buy the coins on the open market. They're available to anyone.
I don't own any PoS coins at the moment either btw.