No, not at all. Especially if you're going through Mosh's course, the little gaps Brian zooms past are covered with Mosh. Brian's course is really good so far, don't get me wrong. When I pointed out some minor gotchas with Brian's course, it was more so in comparison to Mosh's course. But, they are both worth while. I'm going through both and when I feel Brian is going a little faster than I would like (usually around React Hooks), I pause and go through Mosh's course. It's important for me to understand a concept first before using it on the fly. The great thing about Brian's course though is actually the project, because you're not learning concepts in isolation of how you would incorporate them into a real-world project. So, I think Mosh+Brian is like the ultimate weapon. I hear that Josh Comeau goes through smaller projects as well while teaching the concepts in isolation first. So, he's the doing the work of Mosh and Brian in one course. It's just whether reading text and watching videos suits your learning style.
I just remembered also that Tyler McGinnis has a React course coming out. I think his course will be geared towards learning React + being prepared for a Frontend/React interview. That's also really nice. It's nice that there are so many different teaching styles, but this is exactly why people end up in tutorial hell.
My philosophy is to learn something when you know you'll need it. So, Tyler's course will be the course I go through if I intend to apply for React jobs. But, until then, I'd rather focus on two courses and then build something on my own that I can put on my Github.
Edit: You can pick up TS with Mosh's course on the fly. But, if you really want to be a TS dev outside of React, then it makes sense to learn TS independently.
Edit 2: With Brian's course, since it's a large single project, I'm actually coding along so it sinks in. While with Mosh, I'm mostly making sure I understand what he's teaching since it's just concepts (so far). I'm not sure if he goes over a semi-complex project at any point in his lectures. I actually started learning React a year ago with Max's course on Udemy, but there were some small issues with the way he would gloss over some code changes from lecture to lecture that put me off and I stopped taking that course. He would later cover the code that changed in a future video, but when learning something for the first time, the learning should be synchronous and not asynchronous - at least for me.
![[Ebook] Largeapps Dev - Building Large Scale Web Apps | A React Field Guide](https://i.imgur.com/CKxZPRy.png)
