Yes, I read it, but I think a clean new TLS 1.3 with that old retry fallback system like before would still have been the best solution to establish TLS 1.3 without breakage. Poddle was solved by SCSV and this could be part of TLS 1.3 again, but even a desaster that makes us turn off TLS 1.2 5 years from now is a "good" solution because then the middleboxes have been upgraded.