For those who care, not all MoFi titles have gone through digital conversion. But as @slaw correctly pointed out, just as with almost all original pressings and reissues, the lacquers of the all-analogue MoFi LP’s are cut not from the master tape, but from a "safety" (aka "production") copy. One notable exception is the Analogue Productions Kind Of Blue album, for which Bernie Grundman used the original 3-track master tape to cut his lacquer, way back in 1997 (for Classic Records). Numerous guys have compared original 1950’s pressings of KOB with the versions of MoFi, Classic Records, and Analogue Productions. Guess which version came out on top? ;-)
MoFi is of the opinion that their digital step produces a better sounding product than does using an analogue safety tape as the source. But there are other considerations. Just as with the making of all lacquers, equalization may or may not be used. Some of the dissatisfaction with MoFi LP’s---even by those who like many of their titles---is due to equalization choices made by the MoFi engineers.