Cartridge break-in is very real, but real-er for some brands & models than others. Ortofon Cadenza Bronze is an example that sounds great out of the box, right from hour #1 (and pairs great with the hybrid JFET/tube stages). Whereas Koetsu stones can take some mileage to get where they’re going (and tends to want an MC Step-Up Transformer to shine). You need at least 24 - 40 hours of playtime to see what’s up. Then there’s the issue of running in the phono stage itself. Ugh I hate components with long run-in times. I'm so impatient there, and what with the added difficulty of sending a reverse-RIAA signal via DAC/CD to the phono...
Definitely agree with the discussion on flooring and isolation. If I didn’t have a great rack and somewhat rigid flooring, my main table would be a SOTA (or SME, etc) for its built-in suspension system. I had a Clearaudio Innovation that struggled on an inadequate (not even that cheap) rack - the Rega would be just as bad if not worse in that context.
Definitely agree with the discussion on flooring and isolation. If I didn’t have a great rack and somewhat rigid flooring, my main table would be a SOTA (or SME, etc) for its built-in suspension system. I had a Clearaudio Innovation that struggled on an inadequate (not even that cheap) rack - the Rega would be just as bad if not worse in that context.