[Velofellow]

Being in the civil engineering / construction world - no, 5 years tops for "constructing pretty much anything" is not realistic. If 5 years is the horizon, I'd expect to be seeing pretty advanced proofs of concept right now, with field laborers shadowing robots performing QA/QC tasks. None of this is happening in land development or municipal construction from what I've seen.

Consider gravity wastewater installation, which is a fairly simple activity: you've got crews who 1) clear and grub the land 2) perform mass grading 3) either use trenchers or excavators to dig a trench, then backfill to allow for installation at a later time 4) utility installation crew mobilizes begins installation. 5) backfill in lifts with a geo firm taking compaction densities. This is a simplification and omits inspection staff, OSHA safety concerns (because in a world with robots, humans will still need some construction oversight and provisions for safety).

I have not seen these separate activities incorporate AI robots into any of their tasks. Not to say it won't get here eventually, but it's not gonna be 5 years.