What surprising conclusion do observations from the JWST suggest regarding early galaxy history?

Answer

Structurally mature galaxies existed much earlier than predicted by older models.

Newer observations indicate that the assembly of mass, establishment of dark matter halos, and subsequent structural maturity occurred more rapidly in cosmic history than prior models suggested.

What surprising conclusion do observations from the JWST suggest regarding early galaxy history?
galaxystructuretimegravitydark matter