Beware of "FLAC" downloads that are actually (spectrum will show sharp cutoff at 16–18 kHz). Also, many bootlegs claim to be the 2021 Super Deluxe but contain the 1970 Spector version or the 2003 Naked mix.
Source: Giles Martin & Sam Okell stereo mix (de-Spectorized). Closer to the "naked" sound but not dry. Tracks: the beatles let it be 2021 super deluxe flac verified