Technicians are constantly behind in work. Many data centers are pulling 24/7/365 shifts to keep up with demand. Larger data centers have hundreds of full time employees.
Yes many servers are left in fail over states for long periods of time, but that can only be done because new capacity is actively being deployed to make up for that fail over. Modern data centers are far too big for a single person to be repairing things every once in a while. Stuff is breaking every hour of every day
So just double your cloud bill for several few weeks, costing site like GitHub millions of dollars?
How do you handle duplicate requests to external services? Are you going to run credit cards twice? Send emails twice? If not, how do you know it's working with fidelity?
Because it's significantly harder to isolate problems and you'll end up in this loop
* Deploy everything
* It explodes
* Rollback everything
* Spend two weeks finding problem in one system and then fix it
* Deploy everything
* It explodes
* Rollback everything
* Spend two weeks finding a new problem that was created while you were fixing the last problem
* Repeat ad nauseum
Migrating iteratively gives you a foundation to build upon with each component
At least in the short term, I think the economics will prevent stores from using this for marketing data. Operating these drones has to very, very expensive and I don't think knowing about your driving habits for a few miles is worth the cost.
The only reason these things could be economical in the short term is because theft costs retail companies an insanely high amount of money.
However, this might change if these drones become cheaper to operate and purchase.
I would think there's some crime that would prevent people from using these to the extremes. I am almost certain it's illegal to put an air tag on someone to track their whereabouts and I would also think those laws would apply here.
When the shopping cart was first introduced to grocery stores, nobody wanted to use it. People preferred to continue lugging around heavy baskets rather than push a cart. Actors had to be hired to walk around the stores pushing them around to convince people it normal and valuable to use them.
Sometimes people are resistant to use things that improve their life and have to be convinced to work in their own self interest.
I think that's an incorrect oversimplification. The Internet didn't grow from ARPANET like a seed grows into a tree. ARPANET didn't become bigger and bigger until it became the Internet. The Internet was the merger of many networks and many of them never communicated with any computer in ARPANET and we're developed with absolutely zero funding from the United States government.
Yes many servers are left in fail over states for long periods of time, but that can only be done because new capacity is actively being deployed to make up for that fail over. Modern data centers are far too big for a single person to be repairing things every once in a while. Stuff is breaking every hour of every day