You carry a switch-blade? What for? Are you auditioning for West Side Story?
I carry a switchblade. It’s useful, convenient, and pretty versatile. I’ve used it more often than I ever used any Swiss army knife I’ve ever owned, which are always cumbersome, feel fragile, and are rarely sharp enough for the thing I’m trying to use it for.
A thumb-knife with the same inside lock as my switchblade would be a good compromise for me if I were ever forced to give up the switchblade, though. But I can’t stand regular pocket knives with the rear lock, or any “multi-tool”/Swiss army knife I’ve ever used.