Are there any modular storage furniture options that focus on furnishing a multiuse room?

Yes — modular storage furniture is a great fit for a multiuse room because it can flex between storage, display, work, and seating as needed. Common options include:

• Modular shelving systems: Cube shelves, wall-mounted rails, and adjustable uprights that can be reconfigured for books, bins, decor, or office supplies.
• Storage benches and ottomans: Useful for seating plus hidden storage; easy to move around when the room’s purpose changes.
• Modular cabinets and credenzas: Stackable or mix-and-match units that can serve as media storage, craft storage, or a room divider.
• Rolling storage carts: Great for supplies that need to shift between functions, like office items, hobby tools, or cleaning supplies.
• Sectional storage furniture: Pieces like modular sofas with storage chaises or clip-together units that adapt to guest, work, or relaxation modes.
• Fold-down or wall-mounted storage desks: Ideal for rooms that need a workspace only part-time.
• Room-divider storage units: Open shelving or double-sided cabinets that separate zones while adding storage.

If you want, I can also suggest specific modular systems based on the room’s use — for example, a home office/guest room, living room/playroom, or studio apartment.