What I like about VST3:
- plugins are able to shut down as soon as there’s nothing to compute, thus saving CPU power (massively, under certain circumstances)
- they are always 64bit compatible
- they are able to scale to a multi-channel track-format automatically
- side-chain options (!!!)
- dynamically assignable outputs in case of VSTi’s
- more that one internal MIDI-port in case of VSTi’s (… something other formats are missing dreadfully)
- automation options are more consistent, the automation itself is sample-accurate
What I don’t like about VST3:
- no FXB/FXP-files anymore, which makes it much harder to organize and to migrate setups to another system
- no customized folder structure for organizing the plugins’ DLLs
- no true surround processing (with linked side-chains and/or controls for L/R, Ls/Rs and so on, just dumb multi-mono processing)
HTH,