The entrance nobody had budgeted for
A ten-unit block's front door has needed a shove for years. The closer surrendered years back, the latch skates across its keeper without ever seating, and residents have quietly adopted the habit of shouldering it shut.
Adapting is the problem. A door that needs a shove is a door that is not locking on its own, and the building has been relying on residents remembering to push. Renewing the closer, keeper and latch restores a security line the scheme believed it already had, for less than most trustees expect.