You might notice that I keep a last six-month firmware update list on the news pages (right column, below ads). In keeping this list current over the last few years, I've been starting to notice something: the cameras that are important and with longer future legs are the ones that tend to appear in that list.
Look at the cameras that got significant firmware updates (other than lens compatibility) in the last six months:
- Fujifilm XE-3, XT-20, XT-2, X-Pro 2, GFX 50s
- Hasselblad X1D
- Leica M10, TL2
- Olympus E-M1 II
- Panasonic G80/G85, GH5
- Sony A7RII, A7SII, A7II, A7RIII, A9, A6300, A6500
While, for instance, Sony is still selling the original A7 and the A6300, note that they're falling off the recent firmware update list. Likewise Fujifilm with the X-Pro1 generation other than for addition of lens compatibility tables.
Meanwhile, Nikon's fallen completely off the list, mainly because nothing is moving forward with the Nikon 1, it's a dead system.
Where's Canon? That's a good question. They simply haven't done much firmware updating in mirrorless, ever. That's a cocky position.
Reminder, this site's camera database includes current firmware numbers for all mirrorless cameras.