Indeed this is no longer true. With recent ngspice-35 (and appropriate settings) nearly all OpAmp models are o.k.. With ngspice-36 (to be available in November) even the new TLV6002/TLV9001 will do. If you are aware of a model that does not run with ngspice-35, please let me know. I will take care.
What is “appropriate settings”? In KiCad 5.99 you may set PSPICE and KiCad compatibility in the simulator window. With KiCad 5.1 you may follow the advice given in KiCad Eeschema as GUI for ngspice, tutorial for setting up the simulation .
For ngspice models, please see Where do i find models for ngspice? .
For an intro how to set pins etc. please see KiCad Eeschema as GUI for ngspice, tutorial for setting up the simulation .