You summed up this whole discussion in one statement. You don't want anyone to have an advantage over your car. As long as they aren't in the top three let them run. In other words I don't care what they run as long as I win.
Again its not their car beating you its the driver and the setup. Yes technology advances and chassis become obsolete but its no reason to exclude them. If they are obsolete then why are you worried about getting beat? Sounds like the new generation of f1 missed the Mark and the 103 should be the standard. Should everyone shelf the 104 to go back to the 103? That's what is being asked of the 103 owners.
I say you in the post but it is not directed at you just used as an example.