Why not just use the classic int x = 1; and call it a day? - Benefits & Pitfalls

• Consistent syntax
• does not allow narrowing conversions.

But

• variable declared with auto uses brace initialization, its type could be deduced to std::initializer_list
• using std::vectors v(5, 0) != v{5, 0};
• when there’s an overloading constructor that declares its parameter of type std::initializer_list