AFAIK the bulbs are compatible with v1 and v2 hubs, so the bulbs do not need to be replaced. The v1 hubs will continue to work across a local area network. Philips offered a heavily discounted upgrade for v1 hub users to get a new v2 hub.
However, I still think they should support the v1 hubs for the lifespan of a typical bulb (15 years), at minimum.
However, I still think they should support the v1 hubs for the lifespan of a typical bulb (15 years), at minimum.