Why do you have a tach?

[psychocycle]

Just curious and didn't want to high-jack a brother's post. For those of you with a tach, are you using them for red-lining (racing) purposes? For everyday riding, I never saw a need for a tach, your shift points vary depending on the rate of acceleration and aggressiveness of your riding style. Plus, these bike have rev limiters (or so I thought). Just curious, for all my bikes I have never had a tach, but I certainly have had them in some of my cages for practical reasons.... drag racing, towing and 4-wheeling off-road. Thanks for your input.