The workaround would be having your Windows C: drive as SSD, and all others can stay HDD. If you have a lot of memory like 16 or 32 GB Ram, them you could compensate for that by using memory. Like Groove Agent and Halion can run on more RAM and wont affect hard disk read. Though i believe SSD drives are really the best thing a computer can have and is about the best upgrade to boost your PC. Just changing all drives would be costly and to store large VST files or VSTi sounds etc, the normal harddrive is ok. Just changing your C: drive to SSD is the speedup to start with.