Placing 5/7/11/n speakers plus a number of subwoofers also comes at the cost of interior design and practicality ;) It's just (usually) easier to do than proper

Placing 5/7/11/n speakers plus a number of subwoofers also comes at the cost of interior design and practicality ;) It's just (usually) easier to do than proper soundproofing and easier to adapt to non-optimal room designs.