Which galaxy type forms the fewest new stars currently?

Elliptical galaxies

Elliptical galaxies are characterized by having largely finished their major stellar building phases long ago, resulting in the lowest current rate of star formation compared to other types. The fundamental reason for this quiescence is the conspicuous lack of essential raw materials. They have already consumed or otherwise lost the vast majority of their interstellar medium, which consists of the cold, dense molecular gas and dust required to feed new star birth. Consequently, they are often described as 'quiescent' or 'dead,' operating far below the ongoing production levels seen in spiral and irregular galaxies. Their light primarily comes from older stellar populations that began shining billions of years prior.