I'm fairly new to plumbing and have only heard of a water level from a journeyman who was about to retire at the time. I really enjoy working with the guys who have lots of experience, stories and tricks/tips...you learn so much from those guys.Yep Yep.
Your showing your age.......
As far as getting lazy, times change fewer and fewer know how to wipe lead joints, pour inverted joints, hand tap a clay tile sewers, use a water levels etc. Times change tools change.
Hell now we can scan and run apps on the fly have code books on a tablet or not so smart phone. :jester: