There are always more orders of magnitude more feature requests than there are developers/resources to actually build them. The same tends to be the case for bugs. So we are always forced to do "triage"; eg, what are the most important things that we can spend our time on and do that.
As there is (to our knowledge) a limited number of people that want/need this feature and a lot of other features where this is the case, those other features get priority. It could, of course, be that we are wrong in that assessment, but we haven't had many people asking for it.
That being said, Cura is built to be quite modular with the plugin structure, so it's definitely possible for other (third party) developers to pick this up if they want. If it works really well, we could also put that plugin in our bundled packages.