> and use them once they are ready There's always some tiny little thing which is missing for someone. If you demand 100% completion before you can switch, you

> and use them once they are ready There's always some tiny little thing which is missing for someone. If you demand 100% completion before you can switch, you will never switch. > we need to fund their improvement, and use them once they are ready That would mean funding for a long time, without getting any tangible results (since you refuse to use it until it's "ready") until the very end. The end result would be that the funding is abandoned after a while, and you never switch.