Technically yes, but we don't recommend it. Agents run right up until sunset, so you can wait — but discovering a migration issue the day after sunset means a missed report cycle. Once the sunset date is announced, aim to finish your migration two to three weeks ahead so you have time to test each new Automation.
The migration itself is fast (minutes per Agent). What takes time is confirming the kickoff output looks right, reconnecting integrations that may have expired, and handing off to stakeholders who depend on the recurring report. That validation work is what the buffer is for.