Yeah the Montreal area transport system uses the opus system (the disposable cards are part of that) for everything. Sadly, it's now bizarrely more complicated with the weird zones that they recently added after half a decade of consultations that were meant to... stream line intercity travel! for example, if you take the metro in Montreal, then ride it until Laval, you have to buy a specific type of ticket with the two zones.
Meaning that if you just buy the normal ticket in any Montreal station and make the mistake of going to Laval, you can be fined and they do tons of ticket traps because they know that people make that mistake pretty ogten. It's not even a separate line or something. And the same card wouldn't let you take a bus in Laval because again, it's another ticket (but not the same as the one for the dual zone metro that I was talking about earlier...). Just a huge mess when it used to be much simpler before they "streamlined" it.
It's not supposed to. The new REM train network (a few stations already in use) will cover the region. By 2027. Maybe.
REM will also go to YUL.
PS. Fun fact, REM is also driver-less just like the Skytrain.