Based on my experience of the post-SU 4 WASM crashes in other planes, I'd expect it to affect the EFB, the PFDs, the EFIS, and probably the weather radar, and maybe the FMS screen as well. But Not too sure about that one. Maybe I need to go flying in the RJ until I experience a WASM crash and see it for myself lol
Edit: To be clear, I don't have constant WASM crashes -- in the beta they were more common. Since the release of SU4 I think my only WASM crashes have been in a PMDG 777 (1), and in unsupported planes: the TFDi MD-11 (1), and the PMDG 737-600 (2). Thank goodness for a mostly stable sim and planes.