Really ?
Very few wildlife and sports photographers care about ibis and the R3,R1 & R7 look to be targeted directly at this segment. This feature is quite fragile and complex so it's just something unnecessary that might break.
Personally I'd rather have an R7 without ibis that costs several hundred dollars less and I think most people interested in any specialised sports/wildlife camera would agree but sounds like you know everything already
really?
turn the IS off all your super telephotos and tell me how that works for you.
with IBIS + IS you get a more stabilized view, allowing you to focus on your target with minimal movement. That assists with your AF tracking and also your metering, not to mention your composition. I'm also sure that Canon is quite aware of the IBIS durability if there is even an issue there. Not to mention you have IS units in the lenses too.
also if an R7 (or even an R3/R1) is ONLY used with long telephotos, then canon isn't going to sell as many as they could. So it's unwise to suggest that Canon is going to make three expensive camera bodies for one specific use case. Alot of pros still use 24-70's and even wider on the field, NBA games typically you see a lot of 70-200's, etc. you see it every Olympics, every Superbowl, etc (24-70's and even 16-35mm). it's not all about the long telelphotos.
for an R7? Canon is going to *try* to still get other people to buy it. Let's face it. 7D hasn't been a hot seller, just anecdotally, because if was; Nikon and Canon would have spent much more time in this market.
Canon created two "pro" 7D cameras (over 5 years and nothing since 2014), Nikon created 3, but went from 2007 for the D300 to 2016 with the D500. That's it for over what? 11 or so years of DSLR development? How many "pro" aps-c mirrorless is out there from the big three? 0.