For safety. I will say 5 years but it is very likely to be 3 years as IoT OS is not developed in the Western world. The only way the US and the Western world can stop Harmony OS is by banning the import of goods using Harmony, but this will only stop it from populating EuroAsia, the Middle East, Africa, and South America. Huawei's tech lead and related products' cost-effectiveness will overcome most countries' resistance quickly.