wrt “Overreliance on links” - also the opposite, not including relevant supplementary links. If you refer to something, yes give a summary of it so a reader not familiar can understand the context of what comes next without going elsewhere, but also include a link to deeper information where possible so said reader can look into it without extra searching if they want to. Yes they can search if you've given them the right keywords in your summary, but your direct link might be of better quality than such a search finds in the first few results.