Scaling DropBox is not only about sharding the data; it's a huge operation that requires management of thousands of machines, complex and fault tolerant algorit

Scaling DropBox is not only about sharding the data; it's a huge operation that requires management of thousands of machines, complex and fault tolerant algorithms and management of a lot of people (from database administrators, to sys-ops, to very smart developers). It's also not something that you can Google the answers to as very few companies have handled 100+ millions of users, billions of daily updates and petabytes of data. Comparing this to wolf3d is comparing apples to oranges as scaling DropBox and implementing wolf3d are entirely different problem domains . But I would say that wolf3d is a much easier problem that's solved by just one man (John Carmack), while DropBox requires tons of resources and hundreds of people with different skill-sets.