[jacquesm]

What if it turns out to be 70/30 or 50/50?

Stuff like this should be configurable or over-ridable, especially when it has legitimate uses.

There will always be a balancing act between features, security and usability, to ram the needle one way and to say 'tough luck' to everybody else is not a solution because then people will try to find ways around the block.

[noir_lord]

As a programmer the problem with feature toggles is this, lets say we have 1 feature toggle with on been 1 and off been 0.

For one feature that means we have

    1,0 states (two states).

For two features we have

    1,0/1,0 (four states).

By the time you get to 10 feature toggles you have

    1111111111 (1024 possible states).

In case I wasn't clear hammering home this obvious (to us but sadly not managers usually) point, feature flags are binary and when you have 16 of them you have 65536 possible states.

Now as a programmer that frightens me because the possible paths through the system has become incredibly large for us to handle and it's a UX/UI disaster unless handled very carefully, you end up with features that interact with other features (set a do not back up flag on a file, then a different flag for always back up all files) in unpredictable ways for us and for users.

You see this complexity in things like hierarchical role based permission systems and the like.

Not sure what the solution is but I can understand why programmers and users push back on adding features (not least because as a programmer I know that doubling the complexity for 1-5% of users just seems like a poor trade off in general - there are of course specific cases where it makes sense like the 5% of users is roughly the percentage who are paying for your product etc.).

[jacquesm]

That's a very good point, in fact I always use the various global state variables of a program to explain the complexity of the program to others to show them why they can't possibly know their programs do not contain bugs simply because they have not tested all possible states.

Thank you for pointing this out, it is a very important thing to realize and it applies to configurables, global variables and feature switches alike. The more you have seen of the guts of complex systems the more amazed you will be that they work at all.

[oblio]

They should make it opt-out.