You have to admire Sir Clive Sinclair's persistent quest to develop products that are guaranteed to not make money.
The guy makes and effort. Some things are successful, other not.
His principal detractor was Allan Sugar who wanted his own computer business to overtake Sinclair. We forget the many flops that Amstrad created. Not least their disastrous attempt to corner the floppy disc market with their 3 inch nonsense. It was about as reliable as tape and only slightly faster.
The business policies of the 80s are mostly forgotten now. The numerous computer companies, each with their own formats, totally incompatible to any others. That eventually led to the predominance of the IBM compatible simply because the big boys all used it.
We forget the Tape players for Commodore which cost as much as the computer and how you couldn't use a standard Tape Player because of a singly handshake bit!
We forget the so called next generation machines, such as Acorns Risc OS with Hard drive that cost £400 to the £500 for the computer. They supplied a set of 5.25" floppys but unfortunately to use the machine you needed to insert a different floppy each time you entered a command. Soon the floppys stopped working and Acorn refused to replace them, insisting you bought a Hard Drive.
Sinclair took the sensible decision and walked away early and survived to join a different industry altogether.
He could see it was a game for wolves.
The winner was Sugar. Not because he has any brains, he doesn't but because he's a ******* and is currently selling that dubious quality in shows claiming to be about business.