I meant that for a compromised TLD key, the DS record at root lasts for a day. So I didn’t follow how the compromise in a theoretical DANE-only world would be inherently long-lasting.

You said “no recourse,” which I took to mean no recourse even if known. I don’t follow that. The key/DS record at root can be changed. There may not be a “TLD death penalty,” but the key could be changed.

Now without CT it may be tougher to know about the compromise. For websites that don’t have the luxury of certificate pinning, a compromise of TLD kills the whole thing, at least for a time.