Actually I have. I sold my trailer and the guy used my plates on the 407 a few times. I should have cancelled the plates but never thought of it, bad call on my part. On the phone they were rather helpful getting me a printout of where and when the plates were used, as well as sending me the picture taken at each use. Armed with that i was able to contact the buyer and he sent me the $ for the usage.
I am also familiar with the highways that are supposed to exist but don't. When the plans were scrapped that traffic load was shifted elsewhere. The QEW, 403 and 401 (at least for the west end) absorbed it all. What was done to help with that increased traffic load? Did anyone have the foresight to know that the 401 and QEW would soon become overwhelmed? Apparently not. Either that or no one cared enough to do anything about it. Don't even get me started on the DVP.....
They may not be 40 years behind, but they are decades. 10 years ago the drive from Milton to Pearson was a nightmare. Now i'd rather light my pants on fire than do that commute every day. The 401 ought to be no less than 5 lanes each direction from Kitchener to Oshawa.
I can only say that the experiences of myself, and all the people I know when dealing with the 407, have been anything but smooth. Just getting someone on the phone has been an issue, at times.
What I was attempting to illustrate, is that the 401 isn't 40 years behind, or even 'decades' behind, because it's physically incapable of carrying the current volumes. There's nowhere for it to expand. Around the city they've been doing things, like eliminating the breakdown lane which creates an incredibly dangerous situation, not to mention giving traffic no options if a vehicle actually does break down.
The areas, that you're talking about, don't really have the sort of gridlock that would justify the expenditure of creating a 10 lane highway. Once you're past the abortion, that is the 401/410/403 split, things begin to move fairly well on the westbound 401. Eastbound, out to Oshawa, might well be a different situation. It is largely also due to lane merging though.