If all Chinese phone makers jump onto the HarmonyOS bandwagon, then the only major player left using Android will be Samsung no ?
BBK, Xiaomi, Huawei, ZTE can push in some serious money to fund app developers and left Google on her own.
At the end market will decide. If they want HarmonyOS over Android, then Samsung will automatically jump to HarmonyOS too instead of loosing market share. However if market still wants Android over HarmonyOS, then all Chinse smartphone vendor (xiaomi, oppo, vivo, zte, 1+, lenovo, tcl etc) will also still offering Android at least in international market.