Shame. The older 738s I don't mind leaving (though it increases the odds you get an Oasis one) but the E90 is a great little plane.
Feel the same way about the E90 leaving, but we hear like the old F100's they are maintenance intense. Small fleets have their own economic issues anyway. But a bit less confining and a good ride.
The 737 was never a comfortable airplane compared to competitors even before sticking more seats in sideways.