Staples from the 90s like Lightning Bolt or Counterspell still see play on MTG: Arena when format-legal
They often synergize with strategies that focus on control, card draw, and tempo, as many Birds have abilities that support these themes, such as tapping down opponents' creatures, drawing extra cards, or providing battlefield-wide buffs
Its a tremendous opportunity for both brands to grow
These kinds of decks build themselves: stock the deck with X spells, ramp, and the essential Unbound Flourishing, then have fun
What did surprise me though is how nice the Graveyard subtheme ended up being: I count 20 cards that interact with the graveyard directly with a very generous definition, including anything that recurs (Starfield of Nyx), puts itself in the graveyard (Binding the Old Gods), puts other enchantments in the graveyard (Nyxborn Behemoth), or triggers off enchantments going into graveyards (Narci, Fable Singer)