It is now time for my annual message about using apps and AppleScripts from this site with the newest macOS beta.
I have tested a few AppleScripts in the Developer Betas (there have been only two released so far) and they all appear to work as expected. However, until an app has been specifically updated to work with Big Sur, I suggest users be cautious about depending on AppleScripts running on the beta in mission-critical situations. I think this will be probably be more important once computers with ARM-powered silicon start shipping.
If you are on the betas and come across any anomalies, please let me know.