Maintenance mode

In the world of software development, it refers to a point in a computer program's life when it has reached all of its goals and is generally considered to be "complete" and bug-free.

In both cases, continued development is deemed unnecessary or ill-advised, but occasional bug fixes and security patches are still issued, hence the term maintenance mode.

In the world of software maintenance, it refers to the operational mode a device or service may enter when it is being maintained.

[1] Sometimes, when a popular free software project undergoes a major overhaul, the pre-overhaul version is kept active and put into maintenance mode because it will still be widely used in production for the foreseeable future.

Project forks can also spawn from programs that go into maintenance mode too soon or have enough developer support for a more advanced version.