I believe the R5 & R5C can coexist as they are targeting 2 different users. You either need the recording time of the C or you don't... and if you don't, there really isn't a need to get the bigger, and most likely, more expensive camera.
Now the interesting thing is what excuse will the fly by night youtube 'reviewers' give that 'they are returning the camera because...' that's not a smoke screen for returning before the CC bill is due or before return policy expires that they never intended to keep (if they really had it at all). The R5's limited recording time was quite a convenient excuse for them, while being click-bait at the same time (the limits were not a secret before release, but the initial cool down times were not really apparent... however most of the info on both was widely available right after release so it shouldn't have been a surprise to anyone picking up the camera late). Don't get me wrong... I think most reviewers were genuine in the beginning regardless of the review they gave (good or bad) especially during the fact-finding stage, but towards the end it kind of felt like people were just farming views.
Also w/ active cooling, it can be done in a way that doesn't expose the elements to the internal workings of the camera... or even the fan/peltier electronics for that matter.