yes I read it at the time. However, HTTP3 + QUIC config [1] of gRPC also runs over UDP with more fallbacks to make it work over commodity hardware. DDR is a pain for random labs to work with as you have to have admin control over the network and bridges to make it work. This basically means it can't be used in the cloud or most corporate environments. It has huge deployment friction. Given the bad uptake of ROS2, I think the market agrees with me.
Note QUIC and HTTP3 were not really a thing when ROS2 was conceived, but the problem of head of line blocking was known and ROS2 was just a bit too ahead of the curve.
I think the market is pretty into ROS2 actually, its just the PhDs and grad students that will be on ROS1 for a longer time because they don't have the resources to make any switch.
Amazon and a lot of other companies are big on ROS2.
