Should Stranger Things: The First Shadow have been made as a movie instead?

I remember seeing promotions saying that those watching the play will find the "key" to solving Stranger Things 5 or something along the lines of that. And also too, it's a prequel about Henry Creel in the 1950s and what truly happened and where his powers originated from.

I guess my main question is, why relegate it to a stage play all the way in London that only a portion of the fanbase is gonna travel there to watch? (Yes, I'm aware they're playing the stage play in the states on Broadwway) And why make it into a play anyways? Most of us haven't seen it and only know the plot through what people wrote online, and the Duffers seem to indicate they won't put it on Netflix after, which I doubt.

I think it would've been better if The First Shadow was made into a movie instead because it would have exposed Stranger Things to a wider audience, film goers don't have to watch the show first to understand because it's a prequel, and it would be a major leap for the franchise to go on the big screen.

What do you guys think?