Game changers in your lifetime that you could not do with out- tools and gizmos

Wood frame construction jobsites have changed a LOT in the past 10 years. I joined up in 1986. Back then, most guys had their own circular saw, most were "Skil" brand. Hardly anyone had anything else except hand tools.
By the late 90s, guys up here started buying air compressors and nail guns. A few had electric Sawzalls.
From 2010 or so, the switch to cordless stuff has been impossible to ignore. Circular saws, Reciprocating saws,(Sawzalls) drills, impact drills, planers, roto hammer drills, Multi-tools, even some nail guns.
Mechanics.....you hardly see them using air ratchets anymore.