@carlsbad2 Your friend got lucky, as were you.
I do want to warn readers that breakers do get a little warm in use. The breaker that runs my HT system gets to around 80 degrees or so. It’s considered normal.
Even if you don’t have a thermographic camera or thermometer, it’s worth touching every breaker and the exterior of your panel a couple of times a year and feeling for anything warmer than a puppy’s belly. :)
My house had been a rental for about 15 years before I bought it. At some point I made up my mind to replace all the switches and most of the outlets, and I'm so glad I did, cause there was a lot of things to discover.