Old UI Options after 20B Upgrade?

Content

Hello all,

        Just a question for you smart folks.  We are furloughing most of our team after this week and it's possible we won't be back before the 20B update.  I thought I had read that old UI would still be an option after 20B, but would require us to revert it manually and there would be no support for it.  We're trying to update everything as quickly as we can, but just wanted to be sure about our options if there are sections that can't/don't get turned on before we are off.  Can anyone confirm if I