I suppose one can argue about the output but there have already been spin-offs from the JWST inventions that do have practical applications. https://webb.nasa.

I suppose one can argue about the output but there have already been spin-offs from the JWST inventions that do have practical applications. https://webb.nasa.gov/resources/JWST_spinoffs_v122011.pdf https://webb.nasa.gov/resources/JWST_spinoffs_v122011.pdf