Cut and cover is extremely disruptive to the residents around where you're cutting, and extreme care needs to be taken to divert any critical infrastructure (wa

Cut and cover is extremely disruptive to the residents around where you're cutting, and extreme care needs to be taken to divert any critical infrastructure (water, electricity, internet, etc.) in the way. So it won't necessarily be cheaper, and will absolutely involve a lot of NIMBYs with legitimate complaints (who wants to spend a year next to an active construction site?).