(Happy Vivaldi/former Opera user here; it's bittersweet to see that Vivaldi seems to have truly taken the "had it first" mantle from Opera.)
EDIT: though on closer inspection, Neon's tiling feature seems different from Vivaldi's. Vivaldi's is tiling within a tab (actually a tab group); Neon's tiling seems to be at window-level. To me, Vivaldi's is more useful, as Neon's I can replicate in my window manager.
(Happy Vivaldi/former Opera user here; it's bittersweet to see that Vivaldi seems to have truly taken the "had it first" mantle from Opera.)
EDIT: though on closer inspection, Neon's tiling feature seems different from Vivaldi's. Vivaldi's is tiling within a tab (actually a tab group); Neon's tiling seems to be at window-level. To me, Vivaldi's is more useful, as Neon's I can replicate in my window manager.