Sadly for most newspapers, WSJ is in a special position. It has the highest circulation of any paper in the US, and it has a target audience that really doesn't mind paying.
The Houston Chronicle has a similar dual system. The print newspaper is online but paywalled: houstonchronicle.com the "chron.com" version is mostly buzzfeedish fluff that's free.
A paywall wouldn't work out well for many others.