I'm wondering whether there is a way to truncate the results that Stata 17's new collection system stores by default. For example, collect automatically stores most e-class results after regress. It is straightforward to add to the collected results, but it is not clear to me if it is possible to not collect default results. For example, if I'm running a regression with hundreds of explanatory variables but have only one coefficient of interest, I'd prefer to store just that result and not the whole output. This default storage behavior becomes an issue when collecting from a large number of memory-intensive commands (e.g., say, 50 ivreghdfe regressions with many covariates, as in a output table where each cell represent a separate regression), such that loading a saved stjson collection becomes a difficult and quite slow computational task due to the size of the collection (in the 100's of MB).