Would you like to ask Erel how many Android apps he has released just because he... knows B4A and can teach it?
no, I'm just saying that when there is money involved people want to see/touch something instead of taking blind decissions by relying on someone's word.
we all know you will be good at it if you talk/explain as well as you type here
I'm not sure if this product line is for euro high school as the demand in (belgian) companies is mostly .NET (desktop), 'real' Java (multi), objC (ios).
It's excellent when you have free choice (self employed) or to get children/adults into programming as you have the same language for desktop/mobile
and Arduino and with electronics getting ultracheap (thank you Aliexpress) there are a lot more options for 'playing' with electronics than years ago.
I'm always having the principle that if the end result does what it needs to do that it doesn't matter with what it is made.
Unfortunately not everyone is that flexible.