Titles says it all, I just want to know if you would use template literals on production (given that it’s not supported in some browsers) or would you rather use normal strings?
It depends. An important part of UI design is knowing who your users are. These decisions should be based on what browsers and what devices your users are interacting with your website from.
You can always use a transpiler like Babel to make your code work with other browsers which do not yet support template literals.
Yes, you are right. I don’t really care about IE, so maybe I’m good using template literals and arrow functions. But as @RandellDawson mentioned, I should probably use a transpiler however I would like to avoid that for projects that are not too big.