How long early carriers remain useful

How long would Argus, Eagle, Hermes, and the early converted carriers last without treaties?

They would remain while useful for experimentation or distant fleet support, but the slowest ships would probably disappear by the mid-1930s or earlier.

Early carriers can justify their upkeep as test ships while naval aviation is changing rapidly, then continue in distant support roles if their speed is still adequate. Once they cannot contribute to fleet operations or useful experimentation, newer no-treaty construction overtakes them. The slowest examples would probably leave service well before the Second World War.