Neither the existence of this link nor anything in it contradicts the developer's earlier post. It looks like the situation was inaccurately summarized by the HN user with the top comment here—the PeaZip developer didn't announce that he or she was going to stop working on PeaZip.
> Drag & drop from app to system is certainly a mayor usability boost, but it is not simple to implement as it requires a dedicated solution for each supported OS and desktop environment.
Off topic, but this is why many devs choose electron.
That's just not true; I've been using the relatively obscure Void Linux for almost 10 years, and rarely have distro-specific issues, including with Linux-native games from gog.com. Nor do people report distro-specific issues in software I develop on Void.
And it's doubly not true for something like drag-and-drop, which exists on the Desktop Environment level rather than distro level.