I have a Slate AX currently running v4.8.0-beta9 (after flashing back from OWRT-SNAPSHOT) which I'm auditing before I begin testing,^1 a Flint v1 that needs flashing over pure OWRT-SNAPSHOT once I get the time to do so, a Certa (a discontinued GL.iNet travel router — a very small unit!) configured to use GL GUI from a 16GB microSD for its primary storage instead of the puny onboard 16MB flash that I really should get updated, too.
I'm currently using Stangri's PBR ATM on a wired-only router running OWRT 23.05.5 I keep on hand in 'in the lab.' I'm going to do some through testing of GL.iNet implementation to check for leaks, etc. Even then I doubt I'm going to put the Slate AX's v4.8.0-beta9 into prod. I'm just going to get it all reviewed, make some suggestions/bug reports, pull a backup of the confs, then wait for a stable release.
Of course I'm not counting my OWRT VMs. I spin those up/tear them down like perti dishes.
Pull your confs, put them aside, flash v4.8.0-stable on your Beryl AX. If all else fails you can always revert back to the current firmware you're running & restore your confs (LuCI -> System -> Backup / Flash Firmware -> Restore). It takes all of 3 min to reflash using U-boot & restore one tarball.
Here, this should be handy. There's a script, a few tips, you might want to have on your device within the following thread(s):
1.