According to the federal Older Workers Benefit Protection Act of 1990, if laid off as part of a RIF and you are over 40, the firm must provide you 21 days to sign the agreement, not 3 days. This information may come in handy if laid off in December so that the lump sum doesn’t push you to a new tax bracket. They must notify you of your right to have an attorney, etc. This doesn’t mean you can avoid being laid off but just be aware of some of your rights under this Act.
Massachusetts also has its own worker protection for older employees and in MA they must pay you unused and accrued vacation under the Wage Act.
Here is a link to the act and if you google for it you’ll find many law firm pages that break it down.
https://www.eeoc.gov/history/older-workers-benefit-protection-act-1990