So with the latest chapter (1075) we can see a younger Vegapunk visiting the Gorosei.
I'd say this has to be a minimum of at least 30 years ago, if not longer given what Saturn said about having met Vegapunk a long time ago, and he looks much younger than the Ohara incident, and his head is nowhere as big.
But if you look at the Gorosei, even though they are silhouettes, you can clearly see they each have the same amount of facial hair, as they currently do, and Saturn was walking with a cane, even back then. You'd think given the amount of time that has passed, the Younger Gorosei member would be looking more like the older ones now, and the older ones would be looking more like current Vegapunk, but they don't. Their silhouettes look almost exactly the same, as they do right now.
So is it a safe bet to say these guys are indeed immortal, or could there be some other reason as to why it looks like they haven't age a day in over 30 years?

I'd say this has to be a minimum of at least 30 years ago, if not longer given what Saturn said about having met Vegapunk a long time ago, and he looks much younger than the Ohara incident, and his head is nowhere as big.
But if you look at the Gorosei, even though they are silhouettes, you can clearly see they each have the same amount of facial hair, as they currently do, and Saturn was walking with a cane, even back then. You'd think given the amount of time that has passed, the Younger Gorosei member would be looking more like the older ones now, and the older ones would be looking more like current Vegapunk, but they don't. Their silhouettes look almost exactly the same, as they do right now.
So is it a safe bet to say these guys are indeed immortal, or could there be some other reason as to why it looks like they haven't age a day in over 30 years?