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Please tell me it is more stable than Catalina.

Yes; absolutely.

The first couple of Catalina releases were a hot mess—my Apple USB keyboard refused to work reliably; I could only use the Bluetooth keyboard that came with the iMac.

By the time we got to 10.15.7, it was rock-solid.

I've been running the release version for a couple of days now and it's been rock-solid as well.

that's pretty weird. I have catalina on my work machine and i haven't rebooted for weeks except for the most recent patch update

10.15.7 has been very stable for me, on my work laptop I reboot maybe once a week or so and a lot of the weird thunderbolt issues have been resolved (I think 10.15.5 or 10.15.6 IIRC).

Well, I've effectively bricked my brand-new MBP after installing it, so not really...

Obviously, I'm one person out of many, but a quick Google search indicates that I'm probably not the only one that felt stupid updating today.

If you're running an external display alongside your primary display, that could be causing a graphics memory issue. I had to tweak some display settings and it went away. Most system crash messages are pretty-well documented online.