Three rides similar to the 2002 Xcelerator, all of them younger than the Knott’s Berry Farm coaster, are currently out of commission: Top Thrill 2 (2003), Kingda Ka (2005) and Formula Rossa (2010).

The extinction clock is accelerating on the Knott’s Xcelerator roller coaster that is quickly becoming an endangered species as the granddaddy of an aging class of thrill rides watches better ...