Use the native widget toolkit if the platform you target; your users will love you more.
None of the apps on my computer have any sort of cohesion with each other. It might just be me but I think this idea is dead, on Windows and Linux at least.
I target all platforms, and so does most other desktop software today.
Ok for linux it's GTK and Qt. What's native for windows in 2026? It's a complete joke of system UI.
I am pretty sure HN is an enclave of the only remaining people in the world who think this way. A sanctuary preserving the last specimens of an endangered species.
Most native widget toolkits don't actually support rendering into 3d canvasses very well, nor very compact UI layouts. I generally prefer native widgets, but for a dense prosumer application, they aren't always the correct choice (and you'll see even Apple stray from their native UI widgets for, say, Logic Pro)