there are many VSTi's that I could happily run alongside Live without stressing my laptop unduly. I'd love to be able to play them live, have them routed through the same effects within Live as my audio loops, be able to record what I play on the VSTi's straight into Live for further loop processing.
However many recordings of jams you have, there is absolutely no substitute for being able to play something live, responding and interacting with other musicians or just with whatever else you happen to have created in Live. This is what it's all about for me!
And if I can do it all within one software package, so much the better.