While I can see people thinking a LUT a film emulation, it’s just the starting point. Many emulation tools only focus on color which is fine for most people.
For an authentic look, halation, grain patterns, diffusion, highlight roll off, detail resolve and other imperfections are needed to complete the look, of varying qualities for each film stock. Not to mention lens choice as well. Modern lens with software correction may not look right.
Also this software is not specifically for photographers, it’s for motion picture.
You can get a lot of the way there with RawTherapee, grain simulation, halation, and accurate highlight roll off are all well within RT's wheelhouse, and while not fast, I've absolutely used RT from the command line to simply process a set of frames. If you want the thing but you don't want to pay, you can get most of the way there. I stand by my claim.
For an authentic look, halation, grain patterns, diffusion, highlight roll off, detail resolve and other imperfections are needed to complete the look, of varying qualities for each film stock. Not to mention lens choice as well. Modern lens with software correction may not look right.
Also this software is not specifically for photographers, it’s for motion picture.