The manual describes the structure of the machine pretty accurately.
Whether it leads to better results? Probably not. I find it very convenient to have the plus-drive, because I can just save the current snapshot, create a new snapshot and start on something new every time I feel like it…but of course that makes it difficult to finish anything 
So my conclusion: If you are extremely productive and effective at finishing things, the +drive can make you very productive.
I you are good at starting things, but find it difficult to finish things, the +drive won’t help.
Kind regards
Thomas
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