[edabobojr]

One question/concern I have always had -- Do you have multiple feature flags in place at once? How do you avoid the combinatoric increase in possible configurations? If you have feature A and B, what happens if A is turned on first? If B is turned on first? What if they are both turned on at the same time?

[jkodumal]

We do have multiple feature flags in place at once. Our dogfood server (we use LaunchDarkly on LaunchDarkly) has about 30 feature flags going at any given time, and we're a relatively small team (still one standup).

For the most part, flags are independent. When I first started using DVCS (back in the Bitkeeper days) we all thought that merge conflicts from doing feature branching would be a headache, but this didn't end up being the case. I've found the same with feature flags. While it's possible for flags to interact poorly, or to introduce "dependent" or nested flags, it hasn't been a problem for us in practice.

This seems to scale, too-- I haven't heard this to be an issue in practice at larger orgs (Etsy, Netflix, etc.) that do feature flag-driven development.