That approach doesn't scale and it doesn't allow for anywhere near the fishing expedition opportunities that a centralized data repository would allow. Also, t

That approach doesn't scale and it doesn't allow for anywhere near the fishing expedition opportunities that a centralized data repository would allow. Also, that methodology means that data is only centralized during or after an investigation and not en masse, before one – making it less likely that a random person's data will be available for theft via a hack, etc.