While WSJT-X Improved has clear advantages, such as supporting FT2 and competition modes, it is an essential tool. However, I still prefer JTDX for the following two reasons: First, it lacks the convenient band switching buttons found in JTDX Improved, which can be a bit cumbersome when operating remotely on my phone. Second, it doesn't have color-coded message tails, making it difficult to distinguish between messages you are trying to receive and other transmissions. This is just my personal experience, but I hope it is helpful.