Head Fade / Top Fade for audio and video on active track

I’m aware that it’s possible to extend standard video and audio fades to the playhead, but only separately. For audio transitions, this feature is currently almost useless because there’s no crossfade option, and the fade always starts at 0 dB. In Avid, this function is called Head Fade / Top Fade and works for every activated video and audio tracks. It would be fantastic if this feature could also be implemented in Premiere.