I know flat top griddles (i.e. Blackstone) are all the rage right now, but just a reminder that your grill grates can be replaced with griddle options to give you much of the same benefits. Under most flat tops are a series of gas burners after all....
There are many options for single grate replacements, but full size ones do exist:
https://www.weber.com/CA/en/griddle/...ries/6789.html
Holes / troughs for grease and crud management seem to be the biggest difference, but some like the above Weber do have these.
Prices for these aren't cheap, but the Wife freakout factor is far lower for this vs you showing up with yet another "BBQ"
I do see that there are many knockoff ones on Amazon. A single grate replacement can be had for my Weber can be had for $58...