The VSTis are not that big (ST4 is ~33 MB) The big disk user in the .pak file in the program installation folder. Over 600 MB for ST4.
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And that started me looking ...
Syntronik has another 600 MB there too. MODO Bass 150 MB TR5 over 1 GB. And, as for AT5
To my simple mind these seems excessively huge. I can only think that it is the resizeable graphics that is taking up the space, but I could be 100% wrong. I cannot imagine that the basic functionality needs that amount of code.
I also think that there is a lot of common code 9Especially for the effects) between the various products and have suggested to iKM that this code is ripped out into a library .pak, accessible by the various products.