For the same reason as you posting that you want such a feature in a place where no developer will ever see it.
This is just a random thread in a general forum. The hosts forum is for users. For them to discuss DAW's and DAW features... in favor of or not. Posting a thread here is an invitation for user comments. And the thread title itself asks for peoples feedback on whether they use alias clips. And an obvious follow on is, if you are not using them, why not.
The thread has done exactly what it set out to do.
Anyway, you can be at ease... this thread will not have the slightest influence on whether Ableton or Bitwig adds aliased clips in the future.