Thanks to all who replied (I did try a search but didn't find the threads Driver posted). The cop who got under my 2020 yesterday to spray it (bless him, it was 95 degrees out) said my cat was very easy to get to and cut out compared to most cars, and they paint hundreds during these programs every few months (they also do VIN etching, and/or put theft-resistant torx bolts in place of existing license plates bolts, all for free). He said it would take a thief about 90 seconds to get mine. (There were MANY Priuses is line for this!)
I was looking to see if anyone's gone through adding protection, what it costs, whether there are any aftermarket items out there that fit our CX-5s, who you used, etc. I kind of doubt the spray paint thing is anything more than a minor deterrent.