Most brick and mortar retail segments are shrinking, other than food. This is a natural consequence of the presence of internet and big-box general retailers. Office Depot and OfficeMax are merging. Perhaps Staples will merge with the combined company one day, after losing more market share to Amazon, Walmart, etc.
My guess is that Staples will probably be around in 2024, although perhaps a bit smaller than it is now. Kmart started shrinking decades ago, and it's still here.