Being able to play Doom on a microwave has novelty because microwave manufacturers don't support running random software on their microwaves since they are optimizing the product to be a microwave.
>> Embedded stuff varies, but frequently anything capable of running a general purpose OS (which IMHO is generally the line to call it a "computer") can have it replaced.
A microwave isn't generally viewed as a computer. In particular, if not even the manufacturer isn't running arbitrary code on it (only a tiny little program to do... microwave stuff...) then I view it as out of scope to an argument about artificially-restricted computers.
As I said,
>> Embedded stuff varies, but frequently anything capable of running a general purpose OS (which IMHO is generally the line to call it a "computer") can have it replaced.
A microwave isn't generally viewed as a computer. In particular, if not even the manufacturer isn't running arbitrary code on it (only a tiny little program to do... microwave stuff...) then I view it as out of scope to an argument about artificially-restricted computers.