Regarding other plans, QPI and UPI for cache coherent FPGAs were pretty infeasible to do at the sluggish pace that they need in the logic fabric. CXL doesn't need a close connection between the two chips (or the companies), and just uses the PCIe lanes.
FPGA programming has always been very hard, too, so the dream of them everywhere is just not happening.
Maybe Habana Labs?
I can't really tell if it's working out for Intel, but I do hear them mentioned now and then.
Haven't heard much about successful Google acquisitions lately though.
But I guess thats the problem - I had to provide an example
Apple does really well on its rare acquisitions, but they aren't very public as they get successfully absorbed. PA Semi, Intrinsity, more I can't remember.
ATi and Xilinx have by all accounts worked out really well for AMD.