Hello,
To those who suffer from sluggish Iodé 6, you may want to try upgrading to Iodé 7 rather than downgrading to Iodé 4 : Iodé 7 for Samsung S10 beta is now available !
You can then share your feedback with our community on how Iodé 7 beta compares to Iodé 4 (and Iodé 6) in terms of responsiveness.