They should hurry up and build the DCs at double-time then! The last tech crash left us with lots of dark fiber that enabled really cool applications and very low costs.
I can only imagine what could grow out of an oversupply of rack-space and electrical power generation, post-crash.
Electrical power and maybe rack space, but the glass strands of the dark fiber were still perfectly good a number of years later, once demand catches up. Buildings and such still need continuous maintenance. In addition, the actual computational equipment (such as the GPUs that have given nvidia the highest market cap in the world) will be totally worthless.