The high price was an excellent sign that they were overly scarce (for an otherwise limitless resource), and that more were needed.

I think the new gTLDs are great. Most of them aren't exorbitantly expensive, and generally speaking they free you up to have an address on the big wild internet that makes way more sense than the contrived naming conventions we resorted to using in the past (eg: get[???].com, [???]app.com, both of which I can think of prime, famous examples in real world use). Is [???].app really better? Yeah, probably.