Re: really 2 halves. Fork?
Oracle (SW equivalent of Qualcomm?) bought Sun.
That killed Open Office (-> LibreOffice) and Hudson (-> Jenkins).
Google switched Android from Java and JVM, but Oracle sued them.
It's the end of an era. What will the Arduino fork be called?
There are really 3 parts. The core HW, the form factor/Hat connector and the IDE.
I have an Arduino form factor board. It takes Arduino "hats", but it's got a microchip PIC 18F series mpu. I looked at the Arduino IDE and didn't like it. I've programmed loads of different 16F & 18F series PIC mpus in JAL rather than Assembler, Basic or C. Though I did use C and Assembler before switching to JAL. JAL has loads of libraries. The lack of stack on many PIC 16 & 18 makes C a poor match.
I found that I the Arduino form factor was awkward so I've used either prototyping PCBs or stripboard. Any daughter boards were custom layouts decided by the module designer (GPS, mobile modem, 433 MHz OOK RX or TX, LCD module etc.
I guess Microchip got Atmel cheap. They already had various more advanced mpus and ARM core CPUs. I wondered at the time why they didn't by Arduino too, but perhaps they thought it was best left as it was.
So I've never bought any of the Arduino "hats"/perpherials and thus my Arduino form factor PIC 18F board is in a box somewhere.