Mississauga is making progress with bike lanes or more often MUPs on suburban arterials, with a suprising number of cross-rides with bike signals. Better than Toronto seems to be managing on comparable suburban arterials. There are stretches where there are gaps in the network. Riding on the street I tend to only do recreationally outside of rush hour (which would be legitimately terrifying).I could see Bike Share expanding into Port Credit and south Mississauga within 5 years, before all of Toronto is covered, provided there are no jurisdictional hurdles to overcome.
But correct me if I am wrong, most of the suburban areas are still very inhospitable for cycling outside of trails. The GO stations are traffic nightmares at peak periods, and largely located in commercial/industrial areas where there's both more threats to would-be cyclists, and less destinations.