For one, it always seems to be a challenge for me to continue building upon React products. While I could easily flesh out an app solution using Flutter or Swift after learning those two languages, I am not able to create even basic stuff after doing n tutorials with React and NextJS, even though I have done a few pretty okay tutorials from Vercel and the like. I feel it's because those tutorials seem less about learning NextJS/React concepts and more about building the target product.