[bruce511]

We've been doing this for 25 years in our desktop software. Every new feature is behind a checkbox on a "features" screen. This screen is in the program, so users can turn things on and off, but typically its set by one of our staff during the installation phase [1].

The upside is a clean interface which helps during training, support, and day to day use.

The primary downside is discoverability. Occasionally customer needs change and some assume "the software doesn't have that feature" rather than call us, or check online.

That's a problem best solved with good communication, but that can never be perfect.

[1] this is in the B2B space, and has a proper sales, install, support cycle.