Secret Lair Commander Deck Yesterday, content creator ManaCurves posted an interesting message on their Bluesky page
Its still useful for energy acceleration and sniping, but with so many new cards dropping, its getting left behind
That seems to be what is happening here, as Pikachu is exclaiming something while looking very happy and excited
Your opponents can still cast instants during other players turns, just not during their own next turn
Up here in Northeast Pennsylvania where Im from, we just had a nice regional show at the Valley Forge Casino Resort in King of Prussia, PA
With that background, Ill present different points of view depending on what game mode(s) a Magic player may prefer, which I believe is one of the key reasons why the Too Many Cards question lacks a universal answer