It would be hard to move away from a GH5 which has 100% of everything I "need" in a hybrid camera (IBIS, flip screen, 4k 60p, good battery life, usable 6400 iso, 180fps HD, ergonomics, weather sealing, ). At a minimum any camera that would make me leave a GH5 would have to have all these options at a minimum whether it's APSC or FF camera and be under $2500.