I've still got one and agree the OC30 is a flippin' good cartridge by any measure.
I quite like AT cartridges on the whole, but I think that's because they pair well with my usual flavour of gear (turntable, tonearm, phono stage). I am very surprised at the OC9xml being described as thin - it's capable of rearranging furniture in my system. Not that rearranging furniture is the only good measure of a cartridge.
The AT moving magnets have been good here too, when tried, and the old AT95E was a great test of a turntable. I used to use one religiously when setting up a new or rebuilt 'table.
I had thought the thin/etched descriptor of AT cartridges is largely legacy these days, and hugely dependent upon cartridge loading and having a tonearm of the right effective mass.
Steph
Sources: Thorens Ambiance, SME V, Ortofon Windfeld Ti; Phonosophie No.3 (TP90), Ortofon Windfeld; Thorens TD521s, SME 312s, Tubaphon Tu-2 blue; Electrocompaniet EMC-1 UP; Electrocompaniet ECM-1 MkII
Amplification: Gold Note PH-10+PSU-10; Audio Research Ph5; Pathos Logos Mk1.5
Speakers: Ruark Equinox, REL S5
Cables: Chord Sarum, mostly
Portable: Astell+Kern SR35, Sennheiser Momentum 2