No more fixed linked tracks to a mixer channel! hybrid tracks which can have MIDI and audio events and MIDI tracks which events can be linked to VSTis freely, also as many VSTis to ONE MIDI event as you want!
Now you need a track for every single instrument with its effects. Same with audio: If you want to use audio, you need an audio track. If you want different effects for different audio, you need different audio tracks. If you want to use different VSTis for MIDi, you need different MIDI tracks. If you want different effects for the same VSTi, you need two MIDI tracks a.s.o.(Yes, you can solve some of the stuff with event fx but they are not automatable.)
But what about VSTis which are not dedicated to MIDi tracks but can be linked to every MIDi event you want? So you can use ONE MIDI track for an array of different instruments. And the automation of their FXes of the insert section are always with the MIDI event as usual, but on one MIDI track if needed (they are different for every event if wanted)
And what about it if there are no audio and MIDI traxcks anymore but hybrid tracks? So you can have an audio event after an MIDi event on the same track with the effects of the instrument track if wnated. Or with its own FXes which are with the audio event or with the group of audio events which are linked with an audio track.
The same with MIDI events, you can link instrument/Bus mixer channels to MIDI events how you want! So you can link as many instruments, effect channels as you want to ONE MIDI track! This is totally freedom if you have no more hardlinked arrangement track to any mixer channel.