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

Paslode pneumatic guns were the standard for awhile, then Hitachi came along and wiped them out. Nobody used a Paslode on the jobs around here after that.
In the early days of the switch away from corded electric stuff, DeWalt cordless tools were popular. Their battery life was poor though.
I'm running the piss outta my 20v stuff. But I have 8 batteries for 12 tools. Cain't use em all at once! Wish I could!