but yeah, I don't need a filesystem very often for the kinds of things that I do, the most common cases are:

* some kind of settings page, but writes are rare enough I usually just use a chunk of internal flash and don't care about wear leveling
* Some kind of rolling log, sequential storage would probably work for this
* Storage of multiple firmware images for rollback, these are usually such a large fraction of the flash it probably wouldn't make sense to use a FS for