Well, maybe now it disappears a little more into the 905 murk. But not over the decades that Mississauga has become, well, Mississauga. It was the original high-concentration archetype of 905-style sprawl--maybe sometimes tonier (as in the south) or more "idealistic" (as per Erin Mills/Meadowvale). But in the 70s, it was "Mississauga" that became the byword for a certain ultra-suburban leapfrogging-beyond-Metro something in the GTA--all the more so, symbolically speaking, since there wasn't a municipality called "Mississauga" prior to 1968. It was, like, an entirely new glossy-eyed suburban fantasyland creation. (Interestingly, there's no other municipality in the GTA so "new-named"; even the name Clarington was a belated conglomeration of "Clarke" and "Darlington" Townships.)
And frankly, the way you're describing it as registering as "home" and oblivious to anything else, it sounds to me like you grew up in near-total entropy re anything potentially "mythic", positively or negatively, about what was around you--either that, or any such dwelling upon mythos belonged to the distant-to-your-household la-la land of 416-zone chattering class. In which case, maybe you're too Mississaugan for your own good, not being able to see the forest for your own trees--especially if you've gone from Mineola West to suburban sprawl in your personal living environment.
Trying to judge the kind of "mythos" I'm describing from your perspective is like trying to judge contemporary art from the POV of a Bateman-print collector.