Yeah, and newcomers who don't know bitcoin's history--including that of its exchanges like Mt. Gox, Cryptsy, and many others--will probably just assume like you said that crypto exchanges are just like banks, who won't just close all of their branches, take down their websites overnight, and run away with their customers' funds. The really sad part is that because of those exchanges that caused people to lose so much money, it's brought crypto under the microscope of regulators all over the globe.
I think you mistakenly left a closing tag that shouldn't be there on your post. You should edit it and remove the last closing tag.
Think there will ever be a service like Circle circa 2016 where you could just sign up and convert fiat to bitcoin with super-low fees?
I doubt it. I never used it, though. I wasn't into Bitcoin then.
They've seen that there is money to be made, and they've had a taste of the money, so I doubt services like that will ever be available again. It would most likely not be profitable, so "it won't be worth it". Same way memes and altcoins will continue to be created. I heard Kanye West launched another memecoin a couple of days ago. There's money to be made.
And how long do you think it's going to be until all the non-KYC exchanges are gone from the face of the earth?
As long as the government allows it. For now, they just make life difficult for them, and I feel this is because a lot of people don't use them compared to KYC exchanges. When you ask why the government are against non-KYC exchanges, they will give the usual excuses of fraud, terrorism, money laundering, but we all know the main reason.