If you take the 1955 and CPI scale them ...
His 127k networth would be 1M today.
The 12k annual living would be 80k today.
The 175 rent would be 1450 today.
So these are typical non-ERE retirement numbers. He just had that money at 25 though(*). What's interesting is that "doing what you want" after you have enough money to support yourself forever was a driving point AND he has not later scaled up his expenses to match the increased income.
(*) My understanding of ERE is that it has more to do with the extreme part than the early part. Everybody can do extreme (if they want) but not everybody makes the same amount of money.