Is Philips HUE Compatible With Other Bulbs, Or Not?

Many owners of Philips HUE smart lighting systems are variously confused, annoyed or angry, and with good reason, because Philips hasn't been consistent in its statements about HUE support for third-party (non-Philips) bulbs.   Dubious Puppy is confused, annoyed and angry.   In January of this year Philips promised its dedication to an open smart lighting platform and support for...