Sora API launch (changelog Oct 6 2025) -> API shutdown (deprecations page 2026-09-24)                                  353
Sora API launch -> deprecation notice (2026-03-24)                                                                     169
Sora API expansion (changelog Mar 12 2026) -> deprecation notice (2026-03-24)                                          12
Deprecation notice -> API shutdown (the notice period)                                                                 184
Disney agreement (press release Dec 11 2025) -> shutdown announcement (Mar 24 2026)                                    103
OpenAI API shutdown (2026-09-24) -> Azure retirement of sora-2 2025-12-08 (2026-10-15): days AFTER                     21
Azure retirement of sora-2 2025-10-06 (2026-07-15) -> OpenAI shutdown of the same snapshot (2026-09-24): days EARLIER on Azure 71
Azure date for sora-2 2025-12-08 moved 2026-09-15 -> 2026-10-15 (commit ca98eeda30, 2026-08-24)                        30
Remix endpoint 'deprecated in 6 months' from Mar 12 2026 -> about Sep 12 2026; days before the whole API's shutdown    12
gpt-5.4-cyber notice (2026-09-11 -> Oct 1 2026)                                                                        20
specialized-variant minimum (policy: at least 3 months) in days, Sep 11 -> Dec 11                                      91

rows with no replacement: 6 of 145 (deprecations_c7555.out.txt)                                                        4.1%
announcements with no replacement anywhere in the table: 1 of 36                                                       2.8%
rows with >= 180 days' notice: 112 of 145                                                                              77.2%
WSJ via TechCrunch: users fell from about 1,000,000 to under 500,000 (at least this %)                                 50.0%