F-35 is not just a fighter jet but a representation of NG Technologies & Systems, it not just about kill chain but complete military aviation cycle of 5th gen technologies, which began right from the start of manufacturing till its final use.
No country who do not have true 5th gen Technologies would fully benefit from any 5th gen jet in isolation, for 5th gen to work whole 5th gen system of systems are required to work, stealth, radar, EW, DATA link and manpower all have to be at 5th gen stage in terms of technology cycle.
As of now US is the ONLY country in this domain other are trying to achieve the same level of Technological parity, other than China no one look capable enough to achieve this parity.