Looking further, the executive order takes time to be effective. If it is implemented as quickly as possible, Trump could possibly fire people in his last moments in office.
CNN – October 25, 2020 – “Under the executive order, agency heads have 90 days to review which positions should be reclassified, with the deadline falling on January 19 — the day before the presidential inauguration (final determinations would be due in 210 days).”