Well, provide 60 days notice for one:
https://nypost.com/2022/11/04/twitter-sued-over-elon-musks-p...
https://nypost.com/2022/11/04/twitter-sued-over-elon-musks-p...
I think I would’ve taken a “slowly thin the herd” approach, but may be ripping the Band-Aid off is more emotionally acceptable. Also, your best employees, the ones who also have the highest opportunity elsewhere, will leave rather than wait to find out if they pass the mysterious retention test.
In layoff situations it is almost universally better to do it all at once. This was you can assure the remaining staff their positions are safe.
The messaging and timing of course are all debatable.