Blazing_Saddles was released half a year after the 1973 Westworld_film. While Blazing_Saddles and Westworld aren't connected, they are both Westerns set in a fabricated environment.
https://en.wikipedia.org/wiki/Westworld_(film)#Plot Of course in the 1970s, most people didn't have a frame of reference as to how amusement parks might evolve over several decades & generations. There wasn't a general frame of reference for Virtual-Reality, AR,MR_and_XR.
https://bernardmarr.com/the-important-difference-between-augmented-reality-and-mixed-reality
https://ilab.ucalgary.ca/ar-and-robotics , https://www.sciencedirect.com/science/article/pii/S2949882125000416
https://dl.acm.org/doi/10.1145/3491102.3517719
https://www.media.mit.edu/projects/mixed-reality-robots/overview/
https://www.microsoft.com/en-us/research/project/robotics-and-mixed-reality/
https://www.sciencedirect.com/science/article/pii/S2405896319312613
https://ieeexplore.ieee.org/document/7354138
While Westworld consisted of a few interconnected amusement parks, Blazing Saddles broke the 4th wall to reveal a larger aspect of the backlot and production facilities within a modern urban setting.
https://collider.com/mel-brooks-fourth-wall-breaks
"The resulting brawl between townspeople, railroad workers, and Lamarr's thugs literally breaks the fourth wall and bursts onto a neighboring movie set where director Buddy Bizarre is filming a Busby Berkeley-style top-hat-and-tails musical number. The melee then extends into the studio commissary for a food fight and spills out of the Warner Bros. film lot onto the streets of Burbank.
Lamarr escapes the brawl and hails a taxi, instructing the cabbie, "Drive me off this picture!" He hides at Mann's Chinese Theatre, which is showing the premiere of Blazing Saddles. As he settles into his seat, he sees onscreen Bart arriving on horseback outside the theatre. Bart blocks Lamarr's escape and shoots him in the groin. Bart and Jim then enter the theater to watch the end of the film.
Back in the film, Bart announces to the townspeople that he is moving on because his work is done and he has grown bored with protecting them. Riding out of town, he finds Jim, still eating his popcorn, and invites him along to "nowhere special". The two friends briefly ride into the desert before dismounting and boarding a limousine which drives off into the sunset." https://en.wikipedia.org/wiki/Blazing_Saddles#Plot , https://www.youtube.com/watch?v=iCkmfmFYobE
The HBO Westworld_TV_series didn't break the 4th wall, but it told an updated and expanded story from various points in its timeline. The ultimate reveal was telling the last part of the story from a VR or simulation program perspective. There were some hints or clues of this right from the first season.
https://en.wikipedia.org/wiki/Westworld_(TV_series)#Summary
https://www.reddit.com/r/westworld , https://www.reddit.com/r/SimulationTheory
World_on_a_Wire was released 2 months after Westworld (1973) and might as well be in another universe like Alphaville is set.
