Rant warning ...
Biggest question is WHY DO YOU CARE ABOUT SALES NUMBERS ?
That needed all caps.
Seriously is your enjoyment of a product or usage of that product impacted by a string of sales numbers ? Does the quality of that product to you hinge on raw sales numbers ? Do you need to see high sales numbers to have some validation that your purchase was the correct one (or vice versa, that your choice not to purchase) for you ?
If the answer to all of those questions is NO, as it should be, then just enjoy the device. Nothing changes.
If the answer is YES, then you have far too much time on your hands, and seemingly care about insignificant metrics more than the product or merely need 'mud to throw at walls' on forums. Find a more productive past time.
The discussion of sales numbers which inevitably ends up being the same old cliché - product A Vs product B - handbag fight, should means nothing of real importance to anyone other than the OEM and it's stockholders. It has NO impact on the end user, or their experience of the product.
If it sold 500000, 1 million or 5 million, the end product is not any different. Nothing changes. Your usage and enjoyment and it's critical reception is utterly unchanged by those sales figures.
Arguing over Sales numbers is just about the most asinine thing and those that do usually have other agendas or opinions which they need to stoke or validate via a pointless metric.
Those that use it as cannon fodder on forums such as this end up spouting a same tripe. "it sold less than [insert] year or device, so it must be a worse device than product b [usually the posters preferred product/OEM] which sold more and therefore it must be better...
It's just same old garbage over & over, I just can not believe I am the only one who sees this for what it is.
When you care less about the product than its sales numbers something is very array.