Hey RW, Well, I agree with you, up to a point anyway.
I too used to have a B&O TT (A Beogram 3000, as I recall that was also a linear tracking TT, like yours), and I too used a MMC2 cartridge.
The cartridge's mass being so low was certainly a plus, because even though I consider it to be a mid-fi TT (albeit a top of the line mid-fi TT), it did absolutely no damage to my records, as all of my records from that 10 year era sound as good as new, and there is no wear to even my most heavily played albums. I always felt that the cartridge outclassed the TT, IMHO anyway.
However, I will point out that while it had good frequency extension, especially on the top end, I never felt that it soundstaged or imaged nearly as well as any of my more current tables and cartridges. (Of course maybe that is due to my current system being so much better than my old system. I suppose it is possible that the turntable is better than I give it credit for if it were matched up with better electronics.)
My two cents worth anyway.