Probably the most common reason to use DNSSEC is to check a box on a list of compliance rules. And I don't think this will change anything for people who need DNSSEC for compliance.
There's no commercial compliance regime that requires DNSSEC (FedRAMP might be the only exception --- I'm uncertain about the current state of FedRAMP DNSSEC rules --- but that makes sense given that DNSSEC is a giant key escrow scheme.)
FedRAMP requires it, although like many requirements, you may be able to get out of it if you have a good reason and/or your sponsoring agency doesn't care about it.
There are also some large businesses that require, or strongly pressure SaaS providers to use DNSSEC. You can often contest that, but if you have DNSSEC, that's one less thing to argue about in the contract.
Which businesses are those? (I ask because if they're North American, I have a pretty good sense of which large North American businesses even have DNSSEC signatures set up, and it's not many; small enough that you can easily memorize the list.)
MTA-STS was standardized explicitly to support the (nearly universal) use case of mail providers without DNSSEC. Even O365, which ostensibly supports DANE/DNSSEC for email security, does so only for select customers and not for ordinary ones (go look for the TLSAs).
neverssl.com works fine for me, only a small warning in the place where the padlock usually is, that no-one checks anyway.
The browser would be very unhappy with an <input type="password"/> on a non-TLS site (localhost excepted). HSTS would trigger the "massive" warning and refuse to load the site, however.
I just checked it. You mean the very small open padlock icon? The era of browsers warning loudly about HTTP was a decade ago, it got reversed due to pushback.
Well I checked both Chrome and Firefox on mobile and my desktop and they were all much more obvious than just an "open padlock". They both said "Not Secure" and in Firefox it was bright red text. Also in incognito mode Chrome refused to even open the site without a full screen warning. They all make it super clear non-HTTPS sites are not secure so I'm not really sure what your point is?
