I guess YMMV - I've had a propane grill outdoors for decades and no one ever ate my hoses. OTOH, I've had spiders take up residence in my venturis quite often. In the best case I get a yellow flame and in the worse case the flame travels all the way back to the valves which is not good.

Critters can be a problem. If they eat the wiring harness in your car this can be big $. Apparently modern wiring is made with some sort of soy based plastic which critter find to be tasty.

I think for a (semi) permanent installation like what you had I would have used the yellow gas flex tubing. This stuff is either alu or copper inside (solid metal inside, plastic jacket outside), not a rubber hose w/ a braided metal jacket and is about $1/ft and can be buried.

I've had critters gnaw a hole in my grill cover when stored in the garage over the summer so now my grill cover summers inside the house not the garage.

https://www.amazon.com/Flex-Tubing-Pipe-Fittings-Gasflex/dp/B002GV97GO