100% SLOs aren't just impractical. They're logically indefensible, and they corrode every reliability conversation that follows.

The mechanism is the easy part. The willingness to slow shipping when the budget is exhausted is the hard part, and the part most programs skip.

SLO-driven architecture treats the SLO as upstream of the design. If your SLO has never caused you to ship later, it isn't doing the work.

SLO targets need to match observability maturity, not a generic standard. Sometimes leveling up observability is the precondition, not a parallel track.