So how many use MM cartridge and intend to keep it that way ?

When I hear someone say "bass slam", I don't quite know how to take it. Either they are talking about bass that should be reproduced as recorded or about exaggerated bass that they like.
'Messing' with interconnects can be very beneficial even if not exactly free.

It's true sometimes it's an exaggerated bloom in the bass region, but other times I begin to hear more detail and a stronger mix from the bass lines. Example would be Zeppelin JPJ and stand up bass in jazz even from a very low cost cart as a Shure m35x even if it's lacking in other areas.

2 Shure V15 RS
1 AT14Sa
1 Stanton 500 MKII for 78s
2 LOMC
1 HOMC

I can list some of the very best MM/MI/MF from my own collection:

Glanz MF61
AT-ML180 OCC
Grace F-14 Exellent (w/F12B stylus)
Grace F-14 LC-OFC
Grace LEVEL-II BR/MR
AT-ML170 OFC
AT-20SL
Garrott P77 
Joseph Grado Signature TXZ
Pioneer PC-1000 mk2
Stanton W.O.S. 
Victor X-1II
Victor-X1IIE 
Technics 205c mk4 

I run two TT's, one's setup for MC and the other MC or MM but mostly MM.   Which I use is based on the LP I'm playing.  Each type of cartridge flavors the meal in it's own unique way.