It would have eased my mind, but I’m pretty sure the previous owner declined a brake fluid flush when the rear brake job was done. And I didn’t do a flush when I personally replaced the right front caliper (the piston seized after I hit a deer); that was about the time the first shop told me they couldn’t do it.
Unfortunately the rust is a big problem in the U.P. of Michigan. This thing went from no apparent rust in about twenty years in Florida to holes in the door corners after five-ish years in Michigan. There is a good surface coat of rust on a lot of the suspension components, but I was able to replace the struts and get an alignment with no serious issues (I had to cut one stabilizer end link off in the rear).