Given that the underlying motivation here isn't merely bigcorp aggressively following regulation (in which alternative marketplaces can spring up), but rather some arbitrary diktat from the regime for which enforcement will be gradually cranked up (physical reality, logic, and Constitutional rights be damned), the real question is what the overall eventual scope is here, in other words what it makes sense for hobbyists/DIYers to stock up on before the destructionists are able to fully strangle it.

Definitely - LoRA/Meshtastic, SDR transmitters, cheap prepper radios that technically require a license to use, maybe even just cheap antennas that you could make yourself but would rather not have to?

Maybe - ESP32, nRF and other competitively-priced wifi/2.4Ghz microcontrollers/devboards if the China Bad marketing chant really ramps up here? Especially with the recent AI-facilitated reverse engineering to gain SDR-ish functionality. Might have to worry about receive-only SDRs too, since it's not like these people really know the difference.

That's what I can think of off the top of my head, but I've never been heavily into RF. Anything else?