Como dizer "panela velha é que faz comida boa" em inglês

Ou "Galinha velha [é que] dá bom caldo".

Old mares lust after new cruppers.

You understand, of course, that not one person in a thousand is going to understand what a "crupper" is.

Thomas, here follows dictionary.com's description for "crupper".

crup·per /ˈkrʌpər, ˈkrʊp-/
–noun
1. a leather strap fastened to the saddle of a harness and looping under the tail of a horse to prevent the harness from slipping forward.
...

Now the question: Why do old mares have such a lust for new cruppers?

Sugestão:

The older you get, the better you get

Do Filme "The Golden Girls":

"- My mother always used to say: The older you get, the better you get, unless you're a banana."

Good broth may be made in an old pot.

There's many a good tune played on an old fiddle

Donay Mendonça escreveu:Sugestão:

The older you get, the better you get
[...]
"- My mother always used to say: The older you get, the better you get, unless you're a banana."

Nossa @Donay, você sempre arrasa. Essa sim pra mim parece a mais similar e coerente. Obrigado!