ML inference using FPGA's is an active area of research, https://arxiv.org/html/2512.01463v1 and have been successfully used in LHC/HEP detectors such as CMS and ATLAS.
I'd also add the RCA 7835 (5 MW @ 200 MHz), Burhle 4616 (200k kW 200 MHz), and the Litton (12 MW @ 805 MHz) klystron. All currently in use at Fermilab.