I'm the co-founder of Arduino, we do provide support to industrial customers through our Arduino PRO division https://www.arduino.cc/pro we work already with a number of companies to implement our Pro products in their solutions

I stand corrected! Good to know

Well, if this means running an antiquated app on a broken OS for business critical operation... I think it puts you in choosing the lesser evil situation.

On top of that I have bought 2 Siemens MSD80 ECUs (400+ EUR) and maybe around 20 VDO injectors (at 250 EUR each). The reason is not that I am a huge Siemens fan, but that the quality was and still is appaling.

There is no legacy OS as when you start it it simply starts running the program. You just need to program it on a computer, but the software suite is always updated. It is ugly indeed, but not broken.

Its very much broken by design. It has no proper Callstack debugging and thus discourages structured programming - aka use of objects and methods.

You dont use objects and methods in Logo - that goes literally against what it is. Its a FUP based programming device. I mean, it's been some time since I last held one, but I'd be _very_ surprised if you could "code" on it. The whole idea of it, is that you also can create programs on it using its on screen display

Yes, you do not. Its a no code solution for beginners. The very same beginner who rule this industry style wise. https://www.youtube.com/watch?v=bCBPxxIjr9U

You can program it in simatic manager- which can convert other languages (KOP, AWL (Assembly-equivalent if i recall)) into FUP.

Which promotes using it for larger scale projects. Which will not have objects. Not have functions. Just kilometres of ladder logic, by the time the disaster management crew is called.