Underground works well for greenfields construction, where you can map everything out ahead of time and don't have to deal with existing underground services.
It's manageable on low-density streets where its really only three waters and maybe some telephone lines.
It's a nightmare to underground existing infrastructure in dense environments. Underground is already full of three generations of critical comms, corroding gas, water, HV lines that will fail if you look at them wrong, and if you're really unlucky, steam pipes too.
I can't find the exact shot, but I used to have a picture of the 220kV lines parallel to the Desert Road as my desktop background. Something like this:https://johnmathews.smugmug.com/Nov-18-Desert-Road-North-Island/i-CkSm5tK