[itsoktocry]

>If vendor lock in a problem if the customer is happy with it? It is up to the individual customer to decide.

No customer is happy with vendor lock-in. It is negative value to the consumer, which was the parent's point.

[forest_dweller]

Why do people buy Apple products on mass then?

[thesteamboat]

Because there are many factors which go in to decisions and a particular negative feature might be outweighed by other concerns?

Also, pedantic point, I think you were looking for the phrase en masse, of french origin. See https://en.wiktionary.org/wiki/en_masse

[TeMPOraL]

Think how many more people would buy Apple if not for the lock-in.