I dont need a lesson on Philly. Philly is definitely a hub of academia. It has also been suffering what they call white flight for decades. It is a very poorly run city dominated by unions, nepotism, cronism and corruption. The suburbs are fabulous and there are a coupel decent pockets. There are also numerous places you take your life in your hands being around at night.
I agree people should visit to see about the history of our country. It is fabulous and they have spent a fortune creating better visitor centers for folks to see it. With that said it is a place on the decline as it has been for years. SD is full of long term upside. Philly….not so.
Do yourself a favor and spend the afternoon gorging at Reading Terminal Market instead of looking for ways to throw your money away.