The ballasts are pretty easy to wire around. Some bulbs can run with them...but I think that's dumb because they use power and run hot as hell. And they'll fail eventually anyway.
The bulbs are that much brighter...and they use 1/2 the power, and run cooler. It's a no brainer to swap them. It just takes time and the desire to do it.
We've changed all of them here. It's made a big difference in the power bill.