The DX7 a sonic legend. I have made this synthesizer my project for over 20 years. They said it was impossible to program. They were wrong. Its different but once you know the major sound shapers.
There is no pure synth in history that can surpass what a DX7 can do straight from its own engine. As always 100% DX7 sounds.
I still have a Yamaha TX81Z and TX802 in the studio, but rarely if ever used these days. Part of it is the tedium of programming, though a good editor/librarian can take care of that. It would be interesting to combine the TX81Z and analog synths in the same composition, something that was rarely if ever done in the 1980s.