How do writers and show runners decide the best city in which to place a TV sitcom or drama? Is it because of some production calculus having to do with attracting certain advertisers? Is this something that writers sit down and decide when writing a treatment?

Do some writers use their personal emotional connections to cities where they grew up, making the show more relatable to locals or those who know the town or city?

It used to be more common in the past to set shows in fake cities like Hilldale (The Donna Reed Show), Mayfield (Leave It to Beaver), Mayberry (The Andy Griffith Show), etc.