I've added the final line of my signature precisely because of this thread.
Going back to the off-topic (?), Prost had realistic championship chances year every season between 1982 and 1993, with the exceptions of 1987, 1991 (too inferior a car) and 1992 (didn't compete). He won or came agonishingly close to winning the 1983, 1984, 1985, 1986, 1988, 1989, 1990, and 1993 championships. That's EIGHT titles. As it was, had he blocked Senna from joining McLaren in '88 he would have won 85, 86, 88, 89, 90 and 91. Heck, he actually outscored Senna even the year he didn't win it! I guess he would have become bored by that point, and retired after 1992, but given he says he only retired at the end of '93 because he didn't want to be Ayrton's teammate again, who knows...
Edited because Phoenix alerted me of a mistake.