FWIW, I left Namecheap for GKG.net for the sole reason that Namecheap didn't support DNSSEC. And yes, I have deployed DNSSEC and DANE. On https for emailprivacytester.com, and on https, smtp, imap and xmpp for grepular.com.
I'm guessing for DNSSEC, the usage is probably low and for DANE it's probably almost non-existant.
FWIW, I use the Firefox addon "DNSSEC Validator" (also does DANE) - https://www.dnssec-validator.cz/ - So if somebody managed to MITM my connection and insert a different, but still trusted, cert in the way, I'd notice.
DNSSEC/DANE would probably see a lot more adoption if one or more of the main browsers did this sort of validation by default.