Just to give you an idea. Now, this will depend on peoples preferences and driving habits. But... assume on a crappy day, add 20-30 minutes assuming an accident or some backup.
A commute let's say:
Will get you something along the lines of this. Pretty legit. If one has a good job in Philly... this is perfect. And in South NJ.
And if you mind an hour commute, you can still access the powerhouse areas of Elizabeth-Newark for maybe just putting on the radio or some music playlist and enjoying the commute (maybe an audiobook).
So its going to depend on peoples tolerance for commuting. Yeah if you want a 20 minute commute to NYC, you are going to get raped in costs.
So really, its up to the individual. Affordability in NJ can be found... depends on the person. Its not out of reach.
And also... there's a ton of jobs in the suburbs. So it really will in the end depend on where you work, and sometimes the sector. And yeah you might have to sacrifice some of the fancy "city living" but hey... at the end of the day, its one choice. Gas prices aside, all can be accessed via car and time. Or train...