Ceramic pickups share qualities with a PAF style humbucker, pr P-90, pickups people love; steel pole pieces with under-mounted magnets, and a higher inductance than vintage Fender pickup. The ceramic bar(s) serves to bring the flux density of the steel poles slightly closer to that of AlNiCo pole pieces, but only slightly, it's still a lot weaker than any AlNiCo grade, closer to a Gibson style pickup.
They sound fatter, warmer and flatter than vintage AlNiCo pickups. I think after you have your vintage correct Strat on hand for all your vintage needs, it makes sense to have a second Strat with the steel/ceramic pickups, for all the benefits they bring.
Arguably, the vintage style pickups are inferior quality, because the AlNiCo causes a stronger resonance, which is the opposite, of a broad, flat response. If you look at "better" pickups, like low impedance pickups, or active pickups, or even microphones or speakers, you don't want a pronounced resonance, you want flat response. Steel / ceramic pickups have a low resonant Q, they get rid of something that is almost always unwanted. We only desire resonant AlNiCo pickups because a bunch of famous recording were made with them and that has shaped our tastes. And I think when people describe that sound as "sterile", I think what they're really saying is "it's not the sound I'm used to".
Last edited: May 31, 2020