Antioch is more or less a replacement for the ATSF and SP Pittsburg stops, which served the San Francisco Chief and San Joaquin Daylight until A-day.
A number of the Capitol Corridor stops were not served on A-day - and the San Jose-Oakland segment hadn't even seen a passenger train since 1960. Hayward and Fremont hadn't been served since 1941 and 1940 (service until 1960 had used the Coast Line). Agnew (near Great America) lasted until 1960. Emeryville hadn't seen a train since the East Bay Electric Lines closed in 1941. Other than perhaps a SN flag stop at Vacaville Junction, what is now Fairfield-Vacaville station had probably never seen a train stop before. (Of those, only Emeryville has an actual station building.)
On the other side of the country, Woburn had never been an intercity stop (though it had a commuter rail stop until 1981, and Mishawum from 1982 on) until Anderson/Woburn was built in 2001. It's located near the former South Wilmington stop which was probably closed in 1959.
None of the Downeaster stops, the Vermonter stops north of Springfield, and Cape Codder stops east of Providence, had intercity service after the 1960s. (Haverhill had commuter service until 1976 and after 1979; several Cape Cod stops were served by a short-lived commuter line from 1984 to 1988.) Substantial station buildings have been constructed at Saco, Wells, Portland, and Greenfield, plus a large shelter at Wareham. Other stops on those lines either got a small platform shelter, or reused a historic station.