MIne is on all the time. If I'm in shallows I'm looking for holes, drop offs, rocks, weed lines.. so I never turn it off.
Although I'm without it for a while. I had to send it back under warranty. It shuts it's self off about 3 times every hour.
I'll make do with my Navionics app.
Depth finders/sounders and Maps aren't ever going to stop me from being instinctive first.