It should be much easier since GTK+ "4" (not too many changes in GTK+3.x) combined with finally having a theme API, though the intention is to have some bits of GNOME run these development GTK+ versions at some point in future.
They're redoing how widgets work in GTK+ "4". That's basically like changing HTML and having slightly different elements. Though there's a theme API, I wouldn't be surprised if some theme work is needed as a result.
They're redoing how widgets work in GTK+ "4". That's basically like changing HTML and having slightly different elements. Though there's a theme API, I wouldn't be surprised if some theme work is needed as a result.
See the last bits at https://blogs.gnome.org/mclasen/2017/03/31/gtk-happenings-3/ for why I think above things.