I edited mostly a single page many years ago. It wasn't a controversial subject really, just one where there is a lot of garbage popular history and some light revisionism that made it a bit of an effort to remove unreliable sources and add some better sources. Never any issues or fights over it, but I got bored eventually and just let it be.

Recently I edited a page or two, then tried to edit more, but everything is so complex now. All the special markup and stuff to consider is really off-putting. Took me forever to figure out how to properly fix the year of death of a person and some other data I just ignored because it was too much red tape. Wish it was more simple plain text. Makes quick drive-by edits too much work.