Hi,
OK - the quote aspect seems to have more information than the post i can see - maybe i replied at the time you saved the edited information.
I am not sure Linn were being jumped upon for selling a pimped PC. What the issue is, as far as i can see it, is that they offer a system which is not cutting edge, and lacks capabilities, ability to modify and configure, add to etc., compared to a £35 Raspberry Pi.
I did not search extensively, but the lock in, is that for a free software licence you usually have to provide the source code. I do not see Linn doing this. It may be that they are under no obligation to do so with the FreeRTOS licence. So, for a Raspberry Pi based solution you can add and modify as you wish. The same for my Dune Base HD 3D media player - they offer the source code under the licence.
The Linn system works - but it is not superior, it is an embedded system, similar to the Internet Of Things products modified to meet a specific requirement.
Regards,
Shadders.