One of the "rationalizations" I used for changing out the Interstate's.
The Lifelines will eliminate the chance of a spill when servicing and removing for Winter storage. That was an important consideration taking into account the very cramped compartments in the Classic.
The dangers of battery acid is well known and I don't think anyone here is minimizing that fact. If you have a wet cell with caps please follow all safety precautions. (especially proper venting and the dangers of overcharging)
In my case I have two applications where I have a choice in how I service and test. (6v in Ford 12v
marine in boat), the hydrometer, multi-meter and load-tester are all good tools for those purposes.
Remember the old adage....the more tools the better.
"Sticks & stones can break your bones...and hail will dent your Airstream"
So when is this..."old enough to know better" supposed to kick in?