Inflation, and all its modified forms, were proposed as a panacea for answering the nagging problems of standard cosmology:
(i) Why is space so homogeneous and isotropic on the large scale?
(ii) What is the origin of the primeval inhomogeneities there we observe on the small scale like that of stars, galaxies, and clusters?
(iii) Why does the universe appear spatially flat and the parameters are so fined-tuned?
(iv) Where have all the unwanted relics gone, like magnetic monopoles?