There's like an indian family/company that's been making some hiqh quality petrichor perfume for idk at least 100 years, probably several hundreds, if not a thousand or more idk.

I forget what it's called you can probably look it up with perfume pertrichor india

There absolutely are petrichor scented things

Yup. I have a shaving soap like that called "Summer Storm."

https://maggardrazors.com/products/chiseled-face-summer-storm-artisan-shaving-soap-4oz

I've never smelled the stuff but apparently the smell of rain is something people try to bottle.

https://www.atlasobscura.com/articles/smell-of-rain-kannauj-perfume-mitti-attar-india

You'd think more African animals (especially predators) would have that ability, then

This, of course, was summarized most eloquently at the zenith of human evoloution: the 1982 hit single by Toto clearly stating, "I bless the rains down in Africa."

I'm still missing something here. For it to be useful, I'd imagine that it would need to inform decisions, and do so where existing senses would fail.

At least in my environment, if I can smell rain, I could also just as easily use my eyes to see the cumulonimbus clouds and say "rain, due east".

In the savanna are there scenarios where the only awareness of rain would be smelling it? Can you derive directionality at 5 parts per trillion? Does it matter?

You think rain is your ally?

You merely adopted the damp. We Brits were born in it, molded by it. I didn't see dry sand until I was already a man...

Was that area a desert 250,000 years ago?

Moisture is the essence of wetness and wetness is the essence of beauty

Shrek is life.

Yup! I know, I was an expert taster at a large brewery :)

It was fun! And a little bit ruined some beer for me.

Or poliester fleece or blanket when you hear little sparks.
Some will remember playing with a CRT TV screen 👀

Also welding. Also lasgun shots