"Is anyone jaded by new camera releases?"
Not yet. Keep em coming.
Above is my earlier comment. I should explain. I almost never (perhaps never - note to self, fact check that) buy new cameras. But I often by cameras that are a few years old, second hand and now relatively cheap because a new "latest and greatest" version has been released.
New cameras = cheap second hand cameras down the line for people like me. Just like new cars = cheap second hand cars down the line for people like me. Both with cameras and cars I tend to hang onto them for far longer than many people do, which means I skip many generations of camera completely.
We would all do well to remember the connection between new cameras and cheap second hand cameras.
I mostly do not need "new' because "new to me" is quite good enough. I am happy with that situation but I understand how pro photographs chase anything that makes their job easier. And that is fine too. They presumably would never buy the new gear if it did not help make them $. Or at least be able to justify to themselves that this is what is happening (even if it is not).
But do I really value most actual features offered by the latest cameras?
Usually not really but some features I do think to have been absolutely worthwhile. Full frame? (Yes to a significant extent because I am used to full frame (film) perspectives). High ISO ability and dynamic range? (Yes particularly the latter). Better sensor image quality over all with fewer artifacts etc? (Damn right.) Image stabilization? (Yes definitely).
And some that are of less immediate value to me. Super fast focussing? (Hmm maybe not so much as I more often use vintage lenses anyway but of occasionally yes). Bigger files with more pixel count? (Yes perhaps, but mostly only in a "mine is bigger than yours" kind of way).
This is coming from a guy that still owns and uses a 10 year old + Nikon D700 and a 5 year old + Olympus OMD EM 5. And have no plans to change either. Yet! But one day I know I will.