The only things that get cleaned and sanitized in my system are the plate chiller and the discharge tubing. Everything else is just cleaned of all debris and sprayed down. I never scrub or otherwise perform extensive cleaning and sanitization of my tun or kettle. Both have a nice tea-colored patina.
+1
I might be overkilling the cleaning
I usually soak all tubing, siphons, airlocks, bungs, or anything else in PBW for at least an hour and my better bottles get an overnight PBW soak. The one thing I really haven't cleaned, just rinsed is the transfer tube from my mash tun to the kettle. I do scrub my kettle after each use with a green scrubbing pad. I have to admit, I always felt like my siphon and other implements that get minimal exposure to wort/beer probably only needed a rinse. Maybe overkill?