Good point @cleeds. The dynamic element in Dolby makes it more difficult to pull of perfectly than does the static RIAA. I was speaking in terms of the boosting and cutting of frequency bands, used in both Dolby and RIAA filters.
When I bought my first Revox A77 in 1973 (a Mk.3), I bought an Advent 100A stand-alone Dolby unit, but found the Revox quiet enough (I had my dealer---Walter Davies, later known for his LAST record preservative---bias the deck with the reel of Maxell tape I provided him with) so as to make Dolby unnecessary.
I bought myself a pair of the small-capsule condenser mics J. Gordon Holt had very positively reviewed in Stereophile, along with the little Sony mixer he himself used for his live recordings (he was a good engineer), and made live recordings myself. It was shocking to hear how much better they sounded than did almost all my LP’s!