I stopped hanging heavy air coolers bending my motherboard, blocking memory slots and blowing hot air around in my case ten years ago.
The first part was mythbusted some time ago. Today's motherboards are thicker, and the cooler's backplate distributes the it's weight across the entire mobo, even the chassis - since the mobo is attached to said chassis.
Check the 4th post in the following thread of someone transporting PCs, getting into a car crash... the motherboard with an NH-D14 mounted on it actually survives the crash:
https://linustechtips.com/main/topic/983087-can-a-heavy-cooler-break-a-motherboard/
Memory slots: There are air cooling options that get around that. They don't all do it.
3rd part: it shouldn't be as the air cooler is right next to the exhausts - plus, they provide direct cooling for mobo VRMs, which the majority of AIOs don't do.
AIOs can blow hot air into the case, especially if they're mounted as intake.
Read the chart in the gaming reviews. For 50 top Steam games Intel outperformed AMD's best by 5.5%. Intel's top chips also beats AMD in MS Office. The top system for a 9900k cost 7.5% less than AMD's 3950x best.
https://www.legitreviews.com/best-cpu-for-gaming-top-50-steam-games-benchmarked_218261/4
1)It's Steam, mate. It doesn't account for everyone, just like how Mindfactory.de doesn't account for the majority of AMD's Ryzen sales...
2)Who the heck needs a 3950X solely for gaming, when ALL of the Ryzen 3000 cpus - save for the 3600 - perform within 1% of each other? Some guy/gal on their WS was probably on break and wanted to play for a bit.
The 9900K makes a little more sense when the lower thread count of the 9700K won't cut it and the user isn't willing to jump ship to the Red Team.
3)Whoo, ~6% faster than what AMD's X chips can achieve. So, according to that, that means for AMD users, they run about 9fps less at 144hz, 10fps less at 240hz, 30fps less at 500hz...
How much more did it cost for the Intel user to achieve such a feat though?
4)Just MS Office? Surely you have more than just that to go off of for productivity apps?