When Windows first released in 1985, eight years later Microsoft made the best 16-bit Windows in the name of Windows for Workgroup 3.11. Then another 8 years made the best 32-bit Windows called XP and yet another 8 years the best 64-bit Windows 7 was born.
After that PC kind of hit the wall in term of hardware requirement for general users, although clockspeed has been stagnant for different