I got a hair-brained idea that I didn’t want to lose, so I’m putting it here. 
There have been a couple of attempts at graphing calculators already.
I’ve been wanting to create one, too, but I haven’t come up with a compelling reason to do so… Until now.
What about a blocks implementation of a graphing calculator? You get the functionality of MakeCode Arcade, PLUS the extension will generate interactive graphs (and perhaps other cool stuff), PLUS you can create tutorials and skill maps to create interactive lessons! Maybe entire courses!
I like this idea so much that I signed onto the forums for the first time on my phone so that I wouldn’t forget it.
What do y’all think?