I have a deck, partially covered with concrete then wood out from that with 5 cooking devices on the concrete deck part. Yep I try to be as neat and clean as I can ( I am the only one to clean up after my self ) on the concrete, but after 20 years, stuff does get messy at times.
Yep hose it off every once in a while, helps a little, but yep stuff happens. Not much different than having a few drops on the carpet from the kitchen to the deck every once in a while I have to clean up, taking things in and out, even with my dog trying to help me keep spills clean. Ha Ha.
Have had a 36 in Blackstone 4 burner about 6mo or so. Yep it is a lot less messy than cooking on the Kitchen stove with my tile floor, but yep occasionally something gets dropped or gets away from me or a spatula drips, etc. Yep, meat, dog likes. Nope onions or zukini, nope.
Guess all I can say is have a deck and enjoy remembering what spots caused that. Guess I could use a pressure washer on it someday. JMO Ken Everybody's situation or environment is different. I never heard anyone say, "Hey, my 36 inch griddle was way too big". Ha Ha