FYI if someone is reluctant to give up their HDD capacity at the price point an SSD exists, I've had really good luck with IDEA and Pycharm on my Seagate 2.5 1 TB Hybrid (ST1000LM014). I think they can be found on NewEgg for like $70 (for 1 TB), and work well for the sort of caching IDEA tends to do.