What evolutionary path describes galaxies, like our Milky Way, that contrasts with the early shutting down of star formation?

Answer

Continuing to accrue gas and slowly building up stellar mass over time

The text identifies two paths: those that shut down rapidly, and those that continued to accrue gas and slowly build up mass over longer cosmic periods, characteristic of local spiral galaxies.

What evolutionary path describes galaxies, like our Milky Way, that contrasts with the early shutting down of star formation?
Spacegalaxiesastronomydead galaxies