[MichaelZuo]

It's difficult to imagine how more detailed the JWST images could be if they used the same observation time as the Hubble images.

Will there be thousands of additional extremely red shifted galaxies?

[antisthenes]

With a 10x observation time, you would probably be approaching a uniform cosmic background of multitudes of galaxies.

There would be negligible space without a light emitter.

> Will there be thousands of additional extremely red shifted galaxies?

Yes, and also those that were too faint, but not necessarily extremely red-shifted.