Yes, he is usually (and anecdotally) used in every introduction to works that cover vitamins and supplementation 😅 but unfortunately his ideas weren't really backed by science. If you eat more vitamin c than you can absorb, you just pee it out. We actually did that in university (control group, breakfast group, breakfast + 1g of vitamin c group, testing the pee and I think capillary blood). Now, I think there are some findings with intravenous vitamin c acting like an oxidizing agent and killing cancer (?) cells, but macrodosing orally just doesn't give you any effect.

Also, fun fact, your RDA can be met by eating one frozen pizza because vitamin c is used as a food additive everywhere.