Mr. Jennings, who remains a consulting producer at “Jeopardy!,” praised Mr. Richards’s performance. “Mike was the only person up there with any game show hosting chops, and it showed,” he said.

Some fans argue that a relatively bland, little-known host was always a better outcome than a celebrity. “The game is the star, and the contestants are the stars,” said John Podhoretz, the editor of Commentary magazine and a 1987 quarterfinalist in the “Jeopardy!” Tournament of Champions. “The host should be a secondary figure.”

For his part, Mr. Jennings agreed. “What was great about Alex was we didn’t know anything about him: He came into our homes every night and he hosted ‘Jeopardy!,’” Mr. Jennings said. “Today, it’s very hard to find a broadcaster whose priors and opinions you know nothing about.”