Teensy is for sale in the ard shop...
And the 101 and MKR are pretty well supported here therefore ARM is getting through.
Do agree with a centric approach to the ARM subsystem though.
You look at the ESP's and Arduino was not only late to that party but missed it altogether unless you count .ORG and even they were pretty late into the game.
I like the idea of the ESLOV project too.
Been on the backside of testing for CREATE and if what I have seen there is anything to go by its full steam ahead with some fantastic people in the background.
All things aside I think the legal fiasco took a toll and its going to take a little time to recover and build momentum again. The bulwark of the AVR wont last forever and like you I see things moving to better platforms.