> DAP gets its raw data from a Google Analytics account.

A lot of adblockers also block GA. See [0], it's basically half of adblockers (by usage).

Technically-savvy users are both more likely to use adblockers, and more likely to switch to Linux, and more likely to alter the default settings of their adblocker to make it block more stuff. Also privacy-aware users, counter-cultural users, etc.

So the data is probably underestimating the amount of Linux sessions because it can't see them.

> By DAP's count, the Linux desktop now has a 5.8% market share.

We can probably up that by another couple of percentage points at least, just from this effect.

At extremes, if we accept the argument that the vast majority of Linux users will be using an ad-blocker that they have configured to block GA, then 5.8% seems incredibly low.

[0] https://www.quantable.com/analytics/whats-blocking-google-an...