I have read the novella, albeit, about 30 years ago, and seen the silent film with John Barrymore, and the 1931 & 1941 films with Fredric March and Spencer Tracy respectively,
The novella and the films are, how should I say-- divergent? the three of them are all based on the stage play that was produced in RL Stevenson’s lifetime. They do seem to get to the same core, though, that Stevenson did (absent a romance), which is that Dr. Jekyll’s goal was to separate his evil impulses in order to exercise them completely; his mistake is in assuming that the good side will be the stronger side, and easily defeat and eject the evil, when the reverse turns out to be true.
The ultimate message is somewhere between “Look before you leap,” and “Don’t play in God’s domain.” In other words, cautionary, however you choose to frame it, which I found quite deft-- and kinda like the messages we’re getting from genuine scientists about proceeding cautiously with AI. Yes, it’d been done before, but with heavier didacticism.
RE: Soulman; I was 22 when it premiered, and I can tell you it raised a lot of eyebrows at the time. Pretty much the same objections raised here were raised in 1989, even the ones about "Maybe this used to be OK, but not anymore*. The major difference is the vociferousness. Back then, it was “Um, do we still do this? I thought we didn’t anymore?” “Excuse me, but I think this might be offensive?” “Isn’t this a little odd, for 1989-- 1949, maybe.” My favorite was “I’m not black, but…”
I actually can think of a few movies about racism that aren’t racist: Get Out; Do the Right Thing; I’m on the fence, but maybe A Patch of Blue. And, Guess Who’s Coming to Dinner may be as stale as last year’s matzah, but I don’t think it was at all racist in it’s time, and still isn’t really racist, just so banal at this time that it seems to trivialize the problem.