Software maintenance looks like an expense until the month you need it. The work itself is unglamorous — applying security patches before they are exploited, keeping dependencies current so an upgrade is routine rather than a rewrite, watching error rates and performance so problems surface before customers report them, and keeping backups that have actually been tested by restoring one. What it prevents is the expensive scenario: a system two years behind on updates, where every change is risky, nobody remembers how deployment works, and a straightforward fix becomes a project. We also keep documentation current, so you are never dependent on one person’s memory — including ours.