Hi,
I programmed it, but I also don't see any reason to use this option.
But if you have a couple of thousand users, there is always the one or other who needs a certain option.
Of course, it's a big job to make this work for everyone. It is really amazing what people are doing with these machines!
My guess would be that users wit an automatic tool changer might want to use this option. They do not need to have the tool measured with every change because the tools are chucked in their holders so their length of protrusion stays the same, thus can be captured in the tool table.
Thinking of that scenario, I think you are right. I haven't even begun to consider fixed tool lengths and tool tables, and probably won't for some time given the price of ATC. Hopefully in a few years though.