I’m the lead developer of Group-Office (https://www.group-office.com). We use Rocket chat here and some of our customers do. To login we use the Custom OAuth option (Like described here: Rocket Chat — Group-Office documentation) It would be a shame to lose our complete open source chat solution just because custom oauth will be unavailable.
Is there something else possible? What if a Group-Office Oauth plugin is developed? Any tips on how to do this and make it part of the product?