Have over 500 Spydercos, so there's no way I could "use all of them all the time'. Many were purchased as "collectibles" with no intention of every carrying them.
OTOH:
All my Spyderco Kitchen Sharps are users, although some get used every day and others only on rare occasions.
I carry a Kiwi virtually every day and, out of 80 unique ones, 78 are in the "rotation" and get carried and used occaionally.
I also carry a larger Spyderco folder daily and, while most days it will either be the Stretch that STR customized for me in Lignum Vitae, or the bolstered cocobolo one one Sal gave me, I have several dozen other Spydercos that see at least occasional carry.
I keep an Assist in my car's center console and a PE Atlantic Salt in the cargo compartment and, while I hope I never need to use either, I consider both to be users.
I wear sweats around the house, and don't carry a knife in them, so there's a Native V with Mexican Ebony scales on an end table in my living room, a Moran DP in my pantry, a Kopa and a Citadel within reach as I type this, a PE Salt I in the master bathroom, a LH Military on my nightstand (along with a Combat Troodon), and an FRN C41 Native hanging in my garage.