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You might be mistaken, the Monogame Github README cites Celeste as an example made with it.

Ah weird. Did a bit of searching and it looks like maybe it targeted multiple frameworks with the xna API. Including xna itself

Several games used to target Monogame for consoles but XNA for PC, and later FNA for PC.

Monogame on PC used to be somewhat buggy in my hobbyist experience.

Oh interesting. I never hit any walls personally but I guess I didn't push that hard.

XNA was originally designed for XBox Live Arcade indie titles.