Gulp 4???

So there doesn't seem to be a more modern Gulp Basics course than the one you found, but whether or not it is valuable as is depends on what you want to learn:

1. If you are interested in learning about the problems Gulp was built to solve, then this tutorial is good.
2. If you want to learn how to use Gulp, then this tutorial is probably only okay, but not useless, since the changes from version 3 to 4 don't seem too dramatic. I have linked resources below that would allow you to use latest Gulp to complete this tutorial, which would make it an effective Gulp learning experience.
3. If you want to learn the build tool most in demand then this tutorial is meh. Right now webpack is king of build/bundling tools, with Parcel also getting some attention. However, Gulp was popular for years, so there will be many projects being maintained that rely on it (potentially still using version 3). And again, learning about the problems Gulp solves will transfer as domain knowledge to using other tools (like Parcel and Webpack).

If you do decide to do this tutorial, there is a thread in the forums where someone shares the changes they made to complete it using Gulp 4: https://teamtreehouse.com/community/gulp-basics-how-to-update-from-gulp-3-to-gulp-4

And here is an article that goes into more detail about migrating from Gulp version 3 to 4: https://codeburst.io/switching-to-gulp-4-0-271ae63530c0