ElementX is *so* much faster than the current stable versions of Element and its various soft forks (I'm currently using SchildiChat).
As I've said before, I'm guessing it will take another 6-12 months for all the Matrix 2.0 upgrades to be rolled out and fully stabilized in the various app and server software. But if ElementX performance is anything to go by, the new and improved Matrix ecosystem will be well worth an open-minded test.