TPiR has had its share of primetime runs over the years..The Feud is back in primetime again after many years..Jeopardy even had a primetime run back in 1990, and now Pyramid's going to primetime.
How come Wheel never got a chance?
I'm guessing because, unlike the shows listed above,
Wheel 's syndicated edition has always been exclusively in early access (7:00 PM - 8:00 PM Eastern, your time may vary), so it might not have been appealing to any of the networks to put another version of it almost immediately thereafter.
Note
Super Jeopardy! ran on Saturday evenings - I don't know if that was to avoid bumping up against the syndicated edition or not.
Jeopardy! isn't locked into early access, however.