One thing to consider (that likely I'm the only one who will think of it) is how failed elements of the system can be fixed.

I have a friend who is researching improved ways to locate insulation breakdown sites in underground utility cables.

I like buried cables for many reasons. But one reason I don't like them is that they are very hard to locate problems on and even harder to repair. My in-laws lose power pretty frequently due to old buried cables getting shorted by heavy rains.

Digging up the easements every 30 years to replace failing cables sounds fine during Year 1 but is a scary thought at Year 29.

In the normal course of things the folks who advertised the benefits have retired before the long-term consequences come to pass.