Bahamut is not only a ubiquitous Commander threat that can see play in any deck, but its also seeing a lot of play across constructed formats
After your rival casts another spell, it is too late to interrupt the first
First, it takes longer to exhaust a larger supply of sealed product, but more importantly, the larger a sets print run, the less rare the individual cards are too, which tends to lower the price of a sealed product
At 3+ counters, it becomes a 4/4 flier
The only other place where this card may see play is in formats where theres a lot of ETB hate
Standard almost makes sense as an Arena only format, because a lot of the supplemental products arent available on Arena, but then Arena created its own supplemental products and its own explicitly Arena only formats