BMC/BLMC/Austin Rover/Rover, or whatever they wanted to call themselves, is a prime example of how not to run a business. They couldn't have got it more wrong. Even their premium brands like Land-Rover and Jaguar couldn't make up for the total stupidity shown by both the management and the trades unions. The had to produce cars which no-one wanted because the unions would not let them close a plant and the management were not srong enough to stand up to them.
Now companies do their market research to see what the market wants and what they will pay for it. So you have the product ranges which sell and which make profits.
The other example of total ineptitude was the U.S. car makers. When the sales of Japanese and European cars reached 50% of their total domestic market one might have thought that someone would ask why more Yanks were no longer buying Chevvys and Fords. But no, they just carried on building the same old junk with predictable results. The silly thing is that at the same time the European plants of GM and Ford owned products which their basic US market would have loved, like the Mondeo, Astra, Escort, etc.
But we sure make some nice cars in the UK now - Toyota, Nissan, Honda, Ford & Vauxhall. All superb products.