ITT we talk about important physics topics that are important but in fact most physics PhDs don’t actually understand them since they were from a previous era
i’ll start
>second quantization
>S matrix theory
>regge theory and reggae poles
>wilsonian renormalization theory
>the Lund string model for QCD

i bring these topics up basically to highlight how theoretical physics education has massive gaps that leave the current generation of theoretical physicists with giant gaps in their understanding. it’s sad