Model F buckling springs were still a cost-reduced inferior replacement for beam springs¹, which themselves were a decent but imperfect attempt to imitate the best key feel in the history of the universe, the Selectric.

¹ https://deskthority.net/wiki/Beam_spring

Edit: It's not entirely correct to blame cost-reduction alone for the end of the beam springs. ISO 9241 killed the existing beam spring switches, and making the replacements equally good (or better — they did suffer from wobble) would have been expensive.