TILE64 got squeezed at both ends, with GPUs becoming more capable on one side and CPUs getting lots of cores (Threadripper) on the other. The niche just closed up on them.
Tilera was acquired by EZChip in 2014 and then in turn EZChip were acquired by Mellanox - the Tile arch kind of died from lack of attention during that process.
I had a TileGX dev board and ported our product at the time (nearly 10 years ago). It was an ok arch but that’s a tough niche to fight for.