I'm sure you've seen the arguments. People will be playing risk of rain, having a jolly old time. They post about it on some imageboard or forum, and immediately you get people yammering about "1 pixel limbs" this or "unfaithful color schemes" that.
I'm curious why it all matters.
There's certainly arguments to be made for authenticity (which I'll address later), but should that be holding the entire medium up to these strange guidelines on what is or isn't pixelart? As long as it looks good, what does it matter?
For example, let's take the recently-release Hyper Light Drifter:


Visually, HLD is great. The colors work well and the art style is appealing, at least in my opinion, which granted is a your mileage may vary situation.
Still, I've already run across people calling it out as "pseudo-retro 1-pixel limb indie garbage" to pull a quote, and this is a sentiment I've seen leveled at many games before.
The most common reasons I've seen leveled at these kinds of pixel art styles is that it's not "authentic" or that it's just fake-retro garbage, usually citing the 1-pixel limbs or use of gradients. While I have no idea about the latter, the former's been a thing since the earliest days of the medium onwards, though it fell largely out of fashion as the graphical arms races began to build speed.
Still, it strikes me as kind of a weird thing to nitpick about so long as the art looks GOOD.
Even Fez, for all it's flaws in and out of the game itself, looks good and is recognizably "pixel art" in style, despite how often it cheats.
Why is it such an issue?