Senority is for the workplace, music is a dying breed, so instead of making a commercial with a song (by a good band) why not let some up and coming artists have the spotlight
Instead of using a song where the artists are dead (or in this case likely not even making money off of their own song)
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It's funny you say this because still to this day Led Zeppelin sell close to a million records a year. They're not just any band they literally shaped all the music you listen to these days. You obviously know nothing either because some of the members still tour the world playing music for the masses often having sold out.