Neofetch is literally a bash script. There aren’t any libraries or APIs it depends on, and there is basically no chance of it not working in the future. Some people just like to try and sound smart.
The actual problem with Neofetch is that it’s not being updated with new ASCII art for new distros, and not adding new options to show things like a line for display server or other things some people might be interested in. It’s just getting out of date in regular boring ways.