i interviewed for SO in the summer 2022, and must say it was one the best processes I had in this round of interviews.
The technical interviews were comprehensive without being insanely extensive. Computer science based, but not pointless memorization of leetcode exercises. Hands-on system design, with real world examples but also open-ended and conceptual. Behavioural questions that really made sense.
Communication was always clear, frequent and flexible. I always felt accompanied through a fun process, rather than a boring or stressful barrier to the company.
The company, well, is Stackoverflow :)