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.
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.