At some point, maybe with Matomo 4.0 we might even want to make this the default? I can't think of too many downsides of using it except for when you want to make use of the
callback feature in some tracking methods.
It also doesn't fallback to GET if the POST doesn't work but in most cases the POST should work just fine.
fyi: created an issue to eventually enable by default this feature: #13681
looks good, will merge