Do You Play Or Save Your Best Cartridges

I suspect I am like many here, I have a small collection of cartridges. Until recently I would keep a casual playing cartridge set up and I would save my "good" cartridges for evening listening sessions where I am focusing on listening to music at the listening chair. I always had a casual cartridge mounted on an arm, maybe an Audio Technica OC9 III or something along those lines. These days its either an Ortofon MC3000 II or MC5000. 

Earlier this year I finally decided to use the DAC in my Trinov pre amp, and this involved getting a subscription to Roon, and hardwiring the computer and preamp to the router with CAT 6 ethernet cable. The sound is remarkably good, to the point where this can easily be my casual listening format. 

I almost wonder if its necessary to have a casual cartridge. Or should I just play my best ones as often as I want and bite the bullet and know I am getting a new diamond fitted every few years. 

Anyone else go through this kind of decision process?