This one is a bad idea cause you have lots of people pushing fiber through pipes with active fiber in them... and their incentives not to screw up other people's glass are... unclear? :-)
Not really, if one company starts making mistakes, the other will also mistake their cables. It's like a working mexican standoff :)
In reality, Mexican standoffs are often fatal.
Oh, wait: the conduit installer isn't a contractor, they're a monopoly? The people pushing fiber through the conduits are contractors. There are a handful of companies licensed to operate this.
May be workable, but seems more expensive than operating cross connects in a serving wire center with little or no plausible benefit.
No, that's even worse.
It's not perfect, but it works.
People say that about windows. I don't use it, either. Owen