[spolsky]

We are both brave and mad!

Just kidding.

Imagine a traffic chart. The x-axis is time. Trello will last for 20 years, so imagine it going from 2011 to 2031.

The y-axis is usage. The numbers climb up and to the right. We think we can get to 100 million. So imagine either a linear curve or geometric growth or whatever you want, climbing from zero to 100,000,000.

Now think of the area under that curve.

What percentage of it is using IE 8?

Is it worth spending much money on them? Is it worth slowing down to build something for a small group of users that will be gone anyway, and which are only a tiny percentage of the overall usage of Trello over 20 years?