For
>neither I nor my boss are going to find this level of detail useful in a year.
Actually, if you include copious screenshots, you might find it useful forever! You could just change your text, to make your screenshots talk about whatever you wanted to show. Maybe a UX flow observation or suggested change. Maybe you want to show a UI inconsistency. Or you want to showcase a theme change between two major versions or when changing some front-end component. Regardless of why you originally prepared the screenshots, a picture says a thousand words.
If you want to make your writing perennial, try adding screenshots!
If nothing else it will have historical importance.