I'd love for that to be true, but there's a good chance that in doing broad tests you are incurring costs (both to patient health and cost [whether paid by patient, gov, or insurance company]) without getting anything beyond noisy data without useful signal

That's a lot of blood draws to ask of people, for something that doesn't even have a hypothesis.

There are studies like the UK biobank that are trying to collect longitudinal information about a huge number of people, but they're volunteers.