One large past thread and two tinies:

Localsend: An open-source cross-platform alternative to AirDrop - https://news.ycombinator.com/item?id=43343574 - March 2025 (1 comment)

Localsend: Open-Source Airdrop Alternative - https://news.ycombinator.com/item?id=37938183 - Oct 2023 (229 comments)

Localsend: An open source cross-platform alternative to AirDrop - https://news.ycombinator.com/item?id=34936796 - Feb 2023 (1 comment)

(Reposts are fine after a year or so; links to past threads are just to satisfy extra-curious readers)