Possible, but from what I've read, the developers are pretty unhappy about not having an Escape key.
Escape key is a minor thing... I'm a developer, the 16 GB limit it is what it really worries me.
But I think the problem are not the dongles or specifically the ram limit, it is the sensation Apple is creating to the PRO community... being developers, photographers, videographers... etc. It is that they don't care too mucha about us...
Long periods between updates... an even that... the last Mac Pro, many videographers were not really happy with it... the Mac mini is already forgotten, the iMac has not been updated this year... not even a minor spec bump... and then the stellar upgrade of the MacBook Pro is just a touch bar... with a worst keyboard (that it is important for developers) and limited RAM (I am sure that if they upgraded to Kaby Lake next year that problem will go away... if you can wait for the upgrade)
And Apple has a past... many remember that they were forgotten when they stopped doing Aperture to focus on Photos... not just a Pro application... many are still piss with the moving from Final Cut to Final Cut X... and many, because of the previous things, have already move to non Apple apps...
And I think that it is a problem for Apple... because if you are not tied to their apps... and people think they are not doing powerful machines to perform their work, with regret they can jump ship...
http://dgpfotografia.com