I feel like the debris it would cause would be a reason not to use this attack often.

When it comes to damage done, we see in Rogue One a star destroyer, moving slowly, cut another in half. I never denied that lightspeed improved the destructive power, I just said I didn’t think it was at the “omg five million nukes worst OP weapon ever Star Wars ruined” level that people said. When you consider the length of the Raddus is about a fifth of the length of the Supremacy (little bit of an underestimate), one could then very roughly assume I suppose that lightspeed increases destructive power five fold, which I don’t think is enough to utilize it to the extent you think it should be. I will say in fairness when I saw the movie in theaters I didn’t stop to measure the level of ship to ship destruction in the other movies before I decided if I enjoyed the moment, weird I know. Now I’ve gone and done math (however basic) to Star Wars, which has pretty much assured that I hate that moment now too, thanks very much.

As for that page, call me crazy but it looks like there’s a “legends” banner there. Oh, and look at the “appearances,” all books by Timothy Zahn, a man who tried to turn Star Wars into boring military sci-fi. This is literally why they rebooted the canon, so they didn’t have to follow shit like this anymore.