Most of the discussion is around ED/EA here. Your financial situation would impact this decision.
If you have true financial need (per net price calculators/FAFSA/CSS) then you can back out of ED if accepted without predicted aid. But if you have no predicted aid, and get none, you are on the hook for full cost.
Now you may get merit aid at some schools without need, but what is the incentive for a school to do so if accepting you ED ? My son got into NU but with no merit aid (vs $10-$20k/year from other comparable schools with good tech and coops/internships). I am sure some get merit from NU, but you can’t predict. My son turned down NU mainly due to the lack of merit. Ended up at an academically more challenging school and paying less. NU seems to think their “aid” can be in the form of coop earnings, but they can’t guarantee how much you can earn.