Bingowings said:

This has been suggested before, even to the point of having seriously damaged capital ships purposely ramming the ships of the other side (as a tactic it works with the fighters so why not with the larger ships?).

Well, in the novelization it described blockade runners doing suicide runs into the bridges of SD's because they were going to blow up anyways.

and when the battle went on for as long as it did, some hrs according to the novlization, you'd expect more explosions and less ships left over from the battle. The only time you see a ship actually explode, aside from the DS blowing up the two cruisers, is the Star Destroyer right you see out the view port when Admiral Ackbar is telling the ships to concentrate on the SSD.