For iOS/Apple users just use the bulbs through the Home app. I don’t think I’ve used the Hue app in at least a couple of years since configuring that. Fuck Phillips. Won’t be buying any more of their products.
You can, Homekit call it "Adaptive Lighting". It's not as flexible though, you just turn it on and Apple does what it wants - there's no variables you can fiddle with if you don't like what its doing.
Do we know for a fact that it'll keep working after the change? Are there any homekit devices that require you to log in to a separate app? If so, then the change doesn't affect me very much.