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.
I upgraded an s10+ to L4M 23.0 and it gets quite hot soon. Had to turn flight mode on and kill all apps to get it to cool down again. beyond0lte are fine though not having used them that much. It seems overall smoother but it could also be the difference between iode and l4m.