I’ve used word/onenote or FOSS equivalents the same way, they’re fine as a scratchpad for notes. As you said it’s nice being able to shove images in there. There are so many things that don’t belong anywhere else that I will forget after even a half hour break.
They definitely do, especially legacy stuff that’s still kicking. Sweet, sweet tech debt that you hope won’t be a real problem until you’ve moved to a different company.