There should be more challenges that allow for multiple solutions

[cudsys]

For instance, this challenge requires you to use the + operator to combine strings together to make a sentence. However, you can (spoilering just in case you want to find the other solution yourself) use literal templates instead and use no + operators whatsoever.

I find this sort of stuff cool, especially when you learn this stuff later on anyway, which could prompt people to go back to previous challenges and try to solve them in a new way.

[JeremyLT]

Many of tme challenges allow for a wide range of answers. But, if a challenge is about learning a specific piece of syntax, then that piece of syntax is required for the solution.