Probably not for production. The released version of 10.15.3 will be out in about a month, then it might be worth trying. I have both Mojave and Catalina on different disks and can boot to either. So, I'm not stuck using Catalina and this allows me to do a full test without being committed to one or the other.
I will say that day to day, on routine tasks, I am using Catalina. I have cut a few videos (using Resolve) and haven't had any issues. But some programs still don't work on Catalina. Media Composer is one, and Pro Tools just announced a version that will support Catalina. So it's still early days for Catalina.
But, your original post was about lockups. And if you're having lockups/freezes in Mojave, that I can't explain, because it never happened to me in Mojave. If you have situations where the hardware just stops working (mouse freezes, display freezes and you have no choice but to reboot), I would not look to the OS first, I would think about the hardware first, and that means, to me, bios version, memory and bios settings, make sure those are working properly and your settings there are correct, then think about the software.
If, by freezing or lockup, you mean something else, then it might be good to specify what that means. Do you have a situation where an individual program stops working, and you can get out of it, but still have control of the computer? Or is it really a full lockup, where nothing works, and you have to either hit the reset button, or shut down the computer entirely?