I usually get some info on firmware updates for the various printers I test on.
Yet it is not complete , thus not that useful in a global view of a dot firmware aspect.
I've asked for many years to document changes in firmware.
Few makers really do so , even Apple OsX updates are sketchy, Canon EOS dSLR firmware sketchy too.
Maybe a list of what the user would notice is all we need, especially in terms of media set ups.
Hopefully this request will be answered in the future software , future firmware releases.