I have to agree. I guess the only reasonable application for graphical languages is domain specific languages, and even then they need to provide a significant benefit over any text based alternative to outweight the tooling incompatibilities you mentioned.

Except there’s Simulink, which has been around since the 80’s, and is anything but a failure. For a few specific usecases, like modeling complex physical systems and developing control algorithms for them, it’s far better than any traditional text based language. Especially when it comes to maintainability of that code.

Though I have to admit that if you try to use it as a general programming language, you’ll learn that while that’s possible, it’s also very painfull. And even while implementing said control algorithms you’ll occasionally run on to some bits of logic that prove to be annoyingly difficult to implement with it compared to any text based language.

NandGame is a browser puzzle game, where you start of by building basic logic gates from relays and progress from there all the way trough processor design to compiling high-level languages. It does not hold your hand too much, but the invidual puzzles progress so incrementally, it feels almost magical how easily you learn to build computers and compilers.