I think BA did refactor their systems, to modernise them. But poor design, low calibre software engineers, possibly cheap outsourcing the development off-shore, inadequate testing is what is now leading to most of the problems BA is experiencing. I think the most recent incident is probably a combination of an initial hardware problem and then a massive issue of trying to recover crashed applications and databases, messaging systems which have left apps in inconsistent states and thus very difficult to recover.
Biting the hand that feeds IT
