I can't argue with that.
I have a 12" disc sander, but haven't made a circle jig and the disc (PSA) is worn out at the moment so I'd probably have to hand sand away the scorched wood (If it doesn't just burst into flame).
I liked the PSA because it gives a hard surface versus the more cushy H&L stuff. Bad thing is I can't change out discs (say I want to go to a finer grit) without destroying the current one. Tried to locate additional platters, but zilch found and they are a major pain to swap out anyway (requires disassembly of the top half).

Really though, the router bit did very clean work, only rough area was from the initial routing of the groove where it did uphill cuts. I figured it would so I kept the depth to < 1/4"