FNA is an open-source re-implementation of Microsoft's XNA Game Studio framework, which is pretty old. It got discontinued in 2013. Terraria was made with XNA, so it makes sense the devs have a soft spot for it.
Did a bit of digging and found this from 2018. FNA is as close to XNA 4 as possible and that's it. MonoGame really is a "successor" in that it left behind some initial compatibility to keep up with newer hardware (consoles). I can see why someone would prefer FNA in that case.
FNA is an open-source re-implementation of Microsoft's XNA Game Studio framework, which is pretty old. It got discontinued in 2013. Terraria was made with XNA, so it makes sense the devs have a soft spot for it.
I thought MonoGame was supposed to be the "successor" of XNA?
I think FNA and Monogame might be separate forks?
Did a bit of digging and found this from 2018. FNA is as close to XNA 4 as possible and that's it. MonoGame really is a "successor" in that it left behind some initial compatibility to keep up with newer hardware (consoles). I can see why someone would prefer FNA in that case.
https://github.com/FNA-XNA/FNA/issues/154