In today's email from Bigscreen, with the recent news of Valve selling its last remaining stock of Valve Index headset and accessories, they reached out to HTC to ask if 2.0 lighthouses will be discontinued. They responded saying there is no future plan to retire base stations.

What's still needed now is tracked controllers that aren't made by Valve, right?

https://en.shiftall.net/products/gripvr

GripVR is a VR controller compatible with SteamVR™ tracking (Base Station), designed for general-purpose use.It follows the modern standard button layout, allowing anyone to operate it comfortably and intuitively.

https://en.shiftall.net/products/flipvr

FlipVR is a new style VR controller. Its main feature is the ability to flip the control panel (control buttons, thumbstick, grip, and trigger) from the palm side to the back of the hand with a twist of the wrist.

Of course, the base stations cost over $200 each, so as long as they're selling, they're worth continuing to make.