There's an exchange between Paul Strand and Ansel Adams, published (IIRC) in AA's Letters.
Strand had his prized Dagor coated after WW2, and it forced him to change his way of shooting: single coating a Dagor (or Protar) removes the flare from the deepest shadows which affectively provided the Zone I density; like a single exposure unit of Pre-Exposure. To compensate, Strand (and all of us since) had to double his exposure. A MC lens might approach a two Zone loss of density compared to an uncoated Dagor/Protar.
The higher up the scale, the less the effect of flare. By Zone III, flare is non-existent. But an uncoated lens is perfectly capable of extremely contrasty results. Only when we compare contrast side-to-side, do we se the difference. If you increase the development, you get sufficient contrast with an uncoated lens fir B&W. Color is a different set of issues.
Then again, coating 'flare monsters' like Plasmats and Cooke Convertibles made them far more useful.