I test drove an older IM (late 70s/early 80s) some months back. Had a great patina on it due to its age. I loved it. Just get in and drive.
That said, I can be swayed either way on the subject matter. I love the shine on my Speedster. But found I’ve become a bit OCD when it comes to keeping it clean: using a spray detailer before and after each drive. Chrome polish once a month, polish and wax, rubber treatment, leather treatment, etc.