First, I can tell you from personal experience, do not *upgrade* from one macOS version to another. Perform a clean install. There are various sites out there that describe this (mostly) painless procedure. If you use iCloud for your backup, it's quite straightforward. No, I don't care and it doesn't matter if you've *always* "upgraded." You're gambling against the law of averages and stuff gets broken. "Stuff" gets left over and interacts with new "stuff." (I prefer George Carlin's correct pronunciation of "stuff" but this is a family-oriented group).
Since at least Big Sur when my BT completely broke after upgrade (no keyboard, no mouse), I have always performed a clean install.
My brother recently upgraded from Monterey to Ventura and his network (on the Mac) broke. Local was fine, Internet connectivity was completely gone. He backtracked and performed a clean install. I generally wait until x.0.1 before I do my clean install and did that during the days prior to Thanksgiving (in the US) this year when I could devote some time to it.
Second, there should be no need to download the SLabs drivers. They *should* be included in macOS. My KX3 connected via DigiRig worked fine - both CAT and audio after my Ventura install.
All of my radio apps - SmartSDR for Mac, WSJT-X (and derivatives) 2.5.4 and 2.6.0_rc5, GridTracker, JS8Call, Flsuite, have all been tested and work fine on my Intel-based iMac running macOS 13.0.1. I have a user ID on my wife's M1Pro MBP and will test there once I install Ventura on it but I expect no issues there either.
I suspect there are fewer issues with Ventura than complaints would suggest especially when doing a clean install. It's just complaints are usually louder than "no issue here."
Joel - W4JBB