> A second hand DSLR setup is going to be roughly the same price or less.
And if you get one with Pixel Shift, you can get way higher resolutions than the 22MP they're offering (e.g. my cheapo Olympus gets 40MP JPEG or 64MP RAW from a 16MP sensor.)
You’re for sure exceeding the linear resolving power of 35mm film at 40MP or 64MP.
However, a Bayer-filtered sensor has lower color resolution, since each pixel only sees one color. So the pixel shift really helps quite a bit here since the sensor (and Bayer array) are shifting relative to the film multiple times per exposure.
High-quality film scanners maintain color resolution by using linear sensors without Bayer filtering. But they’re slow and expensive.
All the current Nikon Z bodies (and probably other brands too) have different levels of pixel shift where it’ll take 4 or 8 images and basically cancel out that it’s a bayer sensor. The bayer array is a 4 pixel pattern, so it moves one pixel to the right then one down and then one back to capture all 3 channels for each individual pixel. For things like film scanning it works flawlessly, I use it all the time.
Then it’ll do a 16 or 32 shot stack in order to do the same thing but with more resolution.
The scan is the least of the problems - good luck getting to that level of detail with mostly vintage lenses, balancing depth of field and diffraction, keeping the film perfectly flat, on a stable enough tripod with no vibration whatsoever; developing perfectly in the dedicated developer. Yes, it's impressive but no, it's not relevant to the average user or hobbyist.
And if you get one with Pixel Shift, you can get way higher resolutions than the 22MP they're offering (e.g. my cheapo Olympus gets 40MP JPEG or 64MP RAW from a 16MP sensor.)