No, I am not wrong at all.
I am well aware that reflagging happens every day, even with old vessels.
What I pointed out was that there is not all registers, which still accept ships of more than 20 years of age, even if all inspections are passed.
My company tried flags like Malta, Cyprus, Panama and Bahamas without success. Even with class in DNV, all certificates OK and all inspections passed, there was no use in trying. "Sorry, your vessels are too old for our registers", was the answer we got.
So we ended up with Barbados-flag.
Also we could try Comores, Cook Islands, Mongolia, North Korea, Georgia etc. etc., countries like this has no age limit.
So I know for sure that many registers operate with an "age-limit"
Regards Arnes