Technically, they are not paused in the same way as when you right-click on “Recurring” schedule in choose pause. The status will not change to “Paused”, but there is no service to run them. I would recommend you test this rather than just taking my word for it.
You will need to think about and account for schedules that would have running during the time you are migrating. When you enable the AdaptiveJobServer on the new system schedules that are over due will likely run immediately. However, if you have an hourly report and your migration took 8 hours I don’t believe it will run each of those missed scheduled runs, it will run just once and then resume its hourly schedule going forward.
Any other opinions from the community?