Looks like the person who submitted the post has an axe to grind. Found this in their comment history:

'Agreed. Name/Enom support has gone to complete sh*t. They are putting all the money into marketing crap new TLDs.'

I own a few new gTLD's. That's why I know about them. So I'm not unbias. What I would recommend is, do your own research! Figure out what makes a good domain. What makes sense in your particular situation. I don't think I can be fairer in my evaluation than that!

The market for the new gTLDs is consolidating. They're not a one-man shop, like .io was. Donuts Inc. secured a $100mm in funding, for example.

The namespace is wide open. You can get cheap names which look great, are easy to say, short, & memorable. Brand names. Keyword rich. They may not be the best for some markets, given. For forward-thinking demographics, the inverse is probably true. They're not going away. There're more coming. Large companies use them.

The .io domain has been around since the 1990s. It is well established.

I don't think you can compare .io, a ccTLD, with the new gTLDs. It's apples and oranges.

What do you think about ENS - Ethereum Naming System?

Of all the attempts at making an alternate name resolution system, Ethereum's ENS seem to have the most amount of interest and investment going in.

Sure, just create it and convince other people to use it.