[mzronek]

Using server-side templating is another layer of complexity on top of your stack, that just glues together your output. These template languages are not easy to learn. Custom code for loops, escaping, template inheritance etc. Sometimes these are also hard to debug. The documentation of Jinja is huge.

Things get worse when you bring Javascript into the mix. You need to create Javascript code with your template engine without any Javascript toolchain.

Hard no to the string concat approach for me.

[TekMol]

How is React easier to learn and debug?

[mzronek]

With Full-Stack React you will use JSX to directly render HTML. Logic is done with Javascript, so you don't need to learn an additional language. There is also no mapping to Javascript and you can use the standard toolchain (for debugging).