Yes, in new code you should be able to replace almost all new and delete with unique_ptr, vector or, more rarely, shared_ptr. Placement new can still be useful,

Yes, in new code you should be able to replace almost all new and delete with unique_ptr, vector or, more rarely, shared_ptr. Placement new can still be useful, but delete not really. There are some patterns where you use new without a delete for a global singleton that is intentionally never deleted, as well. It's still useful to learn about the concept when dealing with old code.