Should I proactively replace my transfer case actuator?

I own a low-mileage 2011 Tacoma TRD/OR. It has been great for daily driving and light off-roading. However, the front A.D.D. actuator recently died and that completely shut down my entire 4WD system. It was replaced for $1200, so that wasn't bad. However, I'm worrying that I'll be off-roading and my transfer case actuator dies in the same fashion leaving me stranded without ANY 4WD. Has anyone proactively replaced an otherwise functioning (but original) transfer case actuator?

 

Nope, no need too.
Being proactive is inspecting the rubber vent line on the actuator.
That's almost always the reason it fails.

If you want to be proactive, replace the rubber hose/line.

 

You can snip and re-terminate the end of that hose but you'll run out of hose pretty soon. I extended mine with some stainless tubing for the splice, some super glue and some shrink tubing and vacuum line. I have a little extra now and plan to snip a little off every year or so. The ends of these hoses eventually split, like @TnShooter said.