Look, it comes down to the fact that as far as I know, the vast majority of KDE developers are volunteers with their own lives. There was a given explanation for why it hasn’t been fixed, it was complicated code that was hard to maintain. Its not as simple as someone writing code to reimplement the feature, the feature also needs to be maintained which is a lot of work for a project with so few resources compared to proprietary projects that can afford to pay hundreds of full time developers.
People requesting that feature to come back are just kind of rude about it, skipping out on basic manners. Personally if I were a KDE developer I wouldn’t want to work on a feature after all that.