Well, it is on the wishlist, there is not much more we can do here. https://bugs.launchpad.net/kicad/+bug/1577958
Hmm, adding code always creates new bugs, more complexity for users and developers. It's always a question of cost/benefits, economics applies to free software as well. If you look at the other 350 or so feature requests, which features are more or less important? Everyone will have their own view.
There is a sort of voting system, if you click "also affects me" it adds to the bug "heat" index. If we sort by that we get most popular wishlist requests
The top one is teardrops. Curved tracks is not very high, but in the top 75. However, there is not much relation to the popularity and what gets implemented, that depends on whether it's an itch developers also wish to scratch.