The very complex and ambitious solutions they engineered, are currently a nightmare to maintain, as it's hard to hire people who can understand them (thanks to

The very complex and ambitious solutions they engineered, are currently a nightmare to maintain, as it's hard to hire people who can understand them (thanks to the technologies being very new and/or niche). Meanwhile, the requirements were bog standard and there's no demand to be scalable, to have high reliability etc. The system could probably be coded by a bunch of interns and grads in whatever language they fancy.