- 8.3% average globally doesn't necessarily represent 8.3% of your users or market.

- 8.3% is almost much larger than the metric you actually care about -- the percentage of users that will not use Chrome (or your desired set of supported browsers).

Of course, I used that figure because it’s what the poster used. I looked up what it is for the product I work on and it’s actually only 4% — still an order of magnitude larger than it would need to be to consider not supporting it.

The desired set of supported browsers will always come down to metrics.

heck, we're supporting IE11 at great pains with ~4% audience