Neither, they don't have a product. For all we know their technology stack is takeout food.

I'm familiar with RADAR and LIDAR, what is the camera-based alternative to these?

There's not a fancy acronym for it, but it's what most current lane centering tech uses (e.g. Tesla Autopilot). It's actually pretty off the shelf kit from Mobileye.

LIDAR, IIRC

LIDAR is the only way to go, imo.

I was reading one major issue with lidar is bad weather. Microwave can apparently do that OK but the wavelength is a trade off between accuracy, object size and weather/interference avoidance.

In fairness, bad weather is a big challenge for human drivers as well. Largely because we don't realize how much more difficult it is to drive with limited visibility/traction and don't slow down enough.

Tesla is taking an interesting approach trying to generate a point-cloud based on adding a time-dimension to radar

Visual is one thing, but the ability to react during an emergency is actually even more challenging.