The main-stream view seems to be that Weyl's 1918 paper Gravitation and Electricity was initially considered a failure for reasons first pointed out by Einstein. But these initial ideas were reapplied to quantum mechanics giving rise to the idea of gauge-invariance as a symmetry principle in physics in his 1929 paper, Electron and Gravitation
With hindsight today, did any of the ideas contained in his 1918 paper apply to classical physics?