Seeing as I am a hobbyist and no one is paying me to risk destroying one of my cameras, I don't feel any shot I might take is worth putting a camera through a deluge. That is not to say I have not gotten some sprinkling on a camera ever. I can think of three times I've gotten one of my DSLRs slightly wet. That is two of my four DSLR cameras anyway. My Pentax K-100D is converted to full-time Infrared use so I would not even have that camera with me on a cloudy day. My Pentax K-20D is definitely water resistant as you can see o-rings, grommets, and locking "doors" on it, and the advertising stressed its weather or environmental resistance. That was not my main rationale for buying it though. I have had no problems with water, i.e., light rain getting into my main camera, a Pentax K-5, but I don't believe it is as well sealed as the older K-20D because it has gotten dust inside and had to be professionally disassembled and cleaned. The poor thing even had gotten food on it and some of that over time may have worked its way inside. My newest camera is a used Pentax K-3, but I have no idea about its weather proofing as I have not had it long and I have not had it out in the elements yet (dust, sand, mist, rain).

I would not expect my Omega 4x5" View Camera to do well in rain nor my 4x5" wooden folding Field Camera. I do also have several film SLRs and other cameras (film & digital) but I keep them dry. Oh, I used to own a Pentax medium format Pentax 6x7. I believe that was well sealed. I may have gotten a bit of water on that. All in all I think it is best to keep electronics like digital cameras dry and not stored in humid locations.

I also noticed the testers in the study said they did not have a Pentax, Panasonic, or Fuji-Film camera available for testing. Nice they tested a Nikon D850 as it is new. But they should have also tested a Nikon D5 for comparison. I'd wonder, did Nikon F2, F3, or F4 cameras ever leak?

Wow .. it is a good thing I stumbled onto the article Water Tourture Tests for D850..., google it ..I thought I had bought all the D850 accessories I needed .., seems I left out one important one!

Nikon makes a BS-3 Hot Shoe Cover .....what for ..., well .., just for looks and to seek an added accessory ....NO .. as a hot shoe protection ...oh ..OK ..

But ..., But .., come to find out my D850 has a little secret ... when exposed to rain/ water splash .. the D850 L E A K S .. what ..., NO ... YES !

To solve this .., NIKON makes a BS-3 Hot Shoe Cover ...order 2 .. they are cheap and ...easy to misplace ..

First of all, I NEVER take my gear out in the rain or snow, NEVER. If someone wants to take their gear out and have it rained on or put a hose to that's OK for them, but I would never even consider it. Yes, my gear is all weather sealed except for my Nikon 200-500. I carry a plastic bag from the grocery store for the chance it might rain. Yes, I understand that I can take my gear out in the rain and snow, but I don't.
When I was a photojournalist and I was using the papers equipment and had to get the shot, that was different. I respect my equipment too much to be messing with the rain. I do however have a personal solution, I have a Nikon AW 130 for the rain and I do it sometimes if I see a good shot opportunity. The Nikon AW 130 takes great shots and yes, I am not afraid to take it out in the rain, my personal Nikon, Sony, and Canon gear stay dry in a humid free cabinet. And yes, humidity and rain go together and will wear out the best of gear.

Fact not static testing , I have used my Sony A7RII in the constant rain for three weeks trekking through Scottish Highlands and Hebrides Islands last fall with NO water problems. Do I submerge my cameras in water, or drench them with a running hose, NO. But in real-world usage I am no less confident using my Sony gear in poor weather, as I was using my Canon DSLRs in poor weather. I love all these static testers. Other pros from Australia to Europe and across America use their Sony gear for pro wildlife shooting in snow, sub zero temps, blowing sand and spraying water and surf with confidence and success, creating stunning professional images.. FYI, I now have Sony A6500, A7RIII (upgrade from my A7RII) and A7III. Right now I am in Caribbean island of St. Martin where I will use my A7III with no worries from rain, wind spray and beach sand. Cheers