There's an undeniable charm to the older era of pixel art, and surely part of that is nostalgia, but I also think a lot of it comes from the fact that the economics and the hardware were a lot different. Up until the mid 1990s, the highest paid artists in the industry were working on pixel art games. The hardware was slow enough that there were real creative constraints, and we know that constraints often drive creativity.

True by design.

> and purely digital interfaces,

True but not relevant. Even if you connected an LCD monitor over an analog interface like VGA or composite video, it would have to re-digitize the signal. The fact that a screen uses a digital interface can be designed independently of whether a screen has fixed pixels (LCD, OLED) or not (monochrome CRT with continuous phosphor, without shadow mask or aperture grille).

> ensuring a fixed aspect (width-to-height) ratio

True by definition because the pixels are pieces of physical hardware in the screens.

> and completely square pixels.

This is a design choice. Nothing prevents someone from designing an LCD or OLED matrix with non-square pixels. But there's also no good reason to do so. (Side note: Due to RGB striping, single-color subpixels have an aspect ratio of 1:3, so those are non-square.)

Potentially useful trivia: Some image/video formats support declaring the pixel aspect ratio. Examples include PNG ( https://w3c.github.io/png/#11pHYs ) and Matroska.

I think a lot of this is due to where the nostalgia is being aimed. The number of pixelly games trying to look like a c64 or Amiga is vanishingly small compared to the number trying to look like an NES, SNES, or Genesis. (Or a PSX or N64.) And they’re mostly trying to make things like early first-party hits, not later third-party games that do crazy techniques. How many 8-bit-looking games sound like a Tim Follin soundtrack?

And of course given that those machines are from a generation that stopped being the new hotness about 30y ago, we have pro pixel artists who have never seen a game through a shitty connection to a TV unless they deliberately sought one out or had obsessively retro gaming parents; they just like making these square mosaics look like things.