We have a platform product used by 5,000 teams, and we're moving to a new platform that isn't backward compatible. How would you get those teams to migrate?

"I interviewed for a Senior Software Engineer role on the apps side, and the process was a short recruiter call, one standard coding screen, and then a five-round onsite. The biggest thing that stood out was that every interview had two people in it, usually one leading and one shadowing, so it felt like they were calibrating in real time. The onsite mixed normal coding and backend system design with an AI coding round in HackerRank where I had to use their built-in assistant to debug and build out a maze problem. The technical communication round was much more casual than I expected and ended after about 30 minutes because the interviewer said he had what he needed. I finished the full loop but didn't get an offer."