Sure an SSD would help fetching the various TG resources and loading the application itself, but as pointed out above, I don't think it would be worth the chance of impacting the life of the SSD. I put my OS one one for quick booting, but move almost anything I can to a hard drive, including program files, indexing and page files. I don't believe the actual render times, including preparation of populations would be improved at all, or very, very little.