GNOME Devs' (that are also GTK devs) Motivation for Cross-platform GTK4 Apps?

As a GTK developer the answer is quite simple: There is no developer maintaining portability. To have a portable toolkit, you need at least one...

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@retr0id "cross-platform native" is a bit of an oxymoron, don't you find? Unless you take "native" to only mean non-web and nothing else.