So in 10/20 years when I pull out a old R5 to play with, will I need a firmware upgrade for it to work with the 100-500mm f/4-5.6 II ? It seems almost every model needs a software patch, which is a bit odd and concerning for the future. Perhaps over thinking this a wee bit.
This is actually a good thing. The company still makes an effort to support the RP and R. The DSLR line was no different as you had to download profiles into the camera for image correction.
Believe canon should also release more features to these cameras as well like animal eye AF and whatever software goodies that come out in the future.