Maintenance
A site is never finished
A website is never a kitchen.
A client asked us last year when her site would be done. She wanted a finish line, the way you get one for a kitchen remodel. You pay, the counters go in, they hand you the keys, and the counters do not change overnight.
Nobody breaks into your kitchen and quietly swaps your faucet for one that leaks. A website does not work like that. It is a running system sitting on top of a dozen other running systems, and none of them asks your permission before it changes.
The day we ship, everything is up to date. This is the most current your site will ever be, and it starts aging the next morning. Your host updates PHP on a schedule you do not control. WordPress ships a security release that closes a hole; take it and something may move, ignore it and the hole stays open.
Your forms plugin gets bought and rewritten by someone you have never met, on their timeline, not yours. Google changes what it rewards with no announcement, and the site underneath stays flat while the line above it climbs away.
Most hacks are not targeted. They are automated scripts knocking on every door on the internet, all day, looking for the ones left unlocked.
The slow stuff nobody flags.
A site is not an object you own. It is a system changed by people you have never met, on schedules you do not control. A plugin is somebody else's code running on your pages, and when they ship an update there is no third option: you take it and something changes, or you leave it and a known hole sits open like an unlocked door. Maintenance is nothing more than changing the locks before someone tries them.
The team page still lists someone who left a year ago. It does not break anything. It just tells every visitor you stopped paying attention. The hours are wrong, and the one person who would call to check just assumes you are closed. The old case study, the work you were proud of three years ago, is the first thing a prospect reads, and it makes you look like you stopped trying.
The good ones are just well kept.
The sites that stay good are not the ones that were perfect at launch. They are the ones somebody kept tending. A great site is within your control, and it never depended on getting everything right on day one.
The question is not when you finish it, but whether you decide up front that this is a thing you will keep, not a thing you will complete and walk away from, the same standing job Keystone exists to hold.