The original (authorized) sender would then think something went wrong (packet loss), send a new packet and be none the wiser.
I do prefer the WebApp approach so I don't have to install something on each machine before sharing files, but the bug ticket in Pairdrop does not make me hopeful for a good solution (see: https://github.com/schlagmichdoch/PairDrop/issues/44)
Are you able to achieve similar performance in Pairdrop that you did with Localsend?
Here is a link to his podcast where he explains the specification: https://twit.tv/shows/security-now/episodes/935?autostart=fa...
Although if you believe that being online you should be 100% anonymous and share 0% of personal data then of course Topics is not good (but then no other ad targeting solution will be either).