It depends and is a matter of taste. I'm very much a Common Lisp afficionado but I've come to dislike embedding HTML in code like this (also due to experiences

It depends and is a matter of taste. I'm very much a Common Lisp afficionado but I've come to dislike embedding HTML in code like this (also due to experiences in other languages). It's not error prone maybe even less so since it can be checked by the compiler. My preference is to use templating because it matches the final output closer and is, like you said, easier to show to other people / designers. However, even templating is sometimes turned into an enterprise confusing mess where it becomes very complex and hard to know where values come from.