Today: Research syntheses, quantitative systematic reviews, position papers usually take all previous reported research articles at face value.

Future: A research synthesis will dynamically re-analyze all prior work to make as both as relevant to the question at hand and as accurate given all that has been discovered since the original publication.

*Individual patient data re-analysis is done for certain kinds of meta-analyses but very restricted to clinical trials, usually same drug-outcome combination. Nobody does this for larger scale integration of different types of studies and levels of evidence.