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


Not in entry level set-up.
I currently have Goldring 1042, Nottingham Spacedeck/Spacearm, and might try The Cartridge Man or some vintage cartridge later.
inna
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.  
I'm weird, I use old Pickering and Stanton cartridge bodies (I have quite a stockpile) with new JICO Shibata stylii in 'em. Sounds right to me with my old jazz records. I've owned several MCs and other MMS.