[AlotOfReading]

The US government doesn't have a general technological lead. There are a only few specific areas where they have leads by virtue of funding/doing most of the research, like cryptography, sensors, explosives and such. Most of these areas are relatively narrow too. The government is usually buying special versions of readily available commercial products. Any F500 company could buy things just as powerful.

[oldstrangers]

Do you think there's more exascale supercomputers on Earth than are publicly acknowledged?