Here's one from our side: we had a finance client come in with strong fundamentals already in place: solid topical pages, clean UX, and fast load times. The site just needed authority and visibility to match the content quality, so instead of the usual volume approach, we went the other way with very few placements per month, but only on highly selective, relevant sites.
Result: domain authority went from 0 to 42 in a few months, and organic traffic went from essentially 0 to 5,000+ monthly. It worked because the site was already ready to convert that authority into results, and picking sites for topical fit rather than chasing DA/DR numbers meant each link actually carried relevance in the niche, not just raw metrics.
Basically confirms what a lot of people here are already saying: it's not links vs no links, it's links working as a multiplier only when the content, UX, and topical depth are already solid.