I have at least 4 FPGAs that will never be made into asics sitting in my office right now and they're not even for highly technical stuff. They're retro video game things (2 everdrives, a video upscaling device called the OSSC, and an HDMI adapter that plugs into the digital out port of the gamecube originally made for component output).

I bought all these things off the shelf. There are definitely some markets that are well served by FPGAs but are still too small for actual fabrication processes.