I don't know if this is true; I'm not making any claim; weren't renewable energy figures also not economical before we invested a ton of money in them? In other

I don't know if this is true; I'm not making any claim; weren't renewable energy figures also not economical before we invested a ton of money in them? In other words, is there a situation where nuclear becomes economical because we build a lot of it before it's economical?