I never deal with co.xx to be honest. Most websites I visit are on ccTLDs. Whenever I see a .com link to any local business, I start out by assuming it's a scam website.

That said, .app has found plenty of adoption. Tech companies absolutely love .io and .ai is now also gaining popularity. The good American URLs have all been bought years ago so people flock to ccTLDs and gTLDs for new products and businesses. Even .engineering has a few interesting businesses on it these days.

As for .sucks, it's clearly a cash grab, but banning it hardly solves a problem. ycombinatorsucks.com is a lot cheaper than ycombinator.sucks, and if ycombinator pre-emptively buys ycombinatorsucks.com, you could just buy ycombinatorisshit.com or ycombinatorisadoodoohead.com.