I occasionally edit texts with a lot of links to endnotes, references etc. I never did 'get' what Sigil's Links Report was supposed to do for me, but when Kovid produced his Links report I 'got' it immediately.
I'd have to do a side-by-side comparison to say anything further as its been a while since I've used either. But I do seem to remember I had the impression that Sigil's Links Report was a work-in-progress.
Pssst - I also like calibre's word list, handy for spotting inconsistent spelling, especially of proper nouns, abbreviations, and acronyms. Had a paper from Yale the other day, at least three FIBs that should have been FBIs
Deliberate? Don't think so, there were a couple of other valid 'wrong' words that were obvious typos or ignorance (e.g. effect that should have been affect), otherwise it was as dry as moon-dust.
BR