An interesting intersection of those is that the bar for notability is really low for ancient history, if any information is available. Minor people about whom some documentation has survived are interesting to historians, simply because the number of ancient Greeks who we know by name and about whom any information has survived is small, so essentially all of them are of interest to historians. Same with texts: every ancient surviving poem is at least somewhat notable and has some study of it (even surviving poem fragments), which is definitely not the case with every surviving poem from 1995.