Ninety days sounds generous and means nothing to a consumer who ships quarterly.
the four integrators, and their release cadence:
A continuous. a change is deployed the same week.
B fortnightly.
C quarterly, with a change freeze in December.
D "when something breaks". last deploy: 14 months.
a 90-day window gives A twelve opportunities, C one,
and D none.
what we published instead: a sunset date, and a
commitment to move it if a named consumer asks with a
plan. C asked. it moved by six weeks.A window in calendar time is a policy that treats consumers as interchangeable, and they are not — the constraint is the number of release opportunities, which varies by an order of magnitude. Being willing to move the date for a consumer with a plan is what makes the date credible for everybody else.