While the objects in the pools or stacks may seem transient (on your screen for only a few moments), one simple technique is to only allocate those objects at load time and then flip them in an "on" or "off" state during gameplay. That way you're not doing any real allocation after your game space has loaded.

No, those are only seen as "ways to solve the problem" by the functional-style programmers who created the problem in the first place.

Stack allocation is what your computer is built from the ground up to do. It is not some kind of workaround or optimization, it is how software was originally designed to work.