westfw:
The Yun seemed to make sense
IMHO it only made sense until I got mine home and discovered the cock-up they had made of a very good idea.
Now it is sitting in some drawer somewhere. If I look after it then somebody may be able to auction it at Christies in 50 or a 100 years time. Pity I trashed the packaging.
As a more general comment I don't think any small "manufacturer" can have the sort of future security that the OP would like. I don't think this is just an Arduino problem.
It's a bit like wanting to preserve the view from your bedroom window. The ONLY way to guarantee it is to buy all the property that you want to look at. Similarly, if you want to continue using component X then buy a truckload of them now.
...R