So then to your point and mine --
setting the LPF to 120hz as recommended - keeps the low frequencies in the .1 channel up to 120hz going to the sub and then setting your crossovers to 40 or 50 or 60 or 80 or 100 or 120 or whatever for your speakers will keep those frequencies either going to your sub (the lower) or to your speakers (the higher). So setting crossover at 80 means 80 and lower goes to Sub and 81 and higher goes to speakers, etc, etc. Setting the LPF to anything lower than 120 means losing information that could be present in the LFE channel. If your equipment has capability of setting LPF higher than 120hz then the risk is going to be the ability to locate the sub.
Content with full frequencies in the .1 will be bass managed.
Problem solved 100%.
So, first you seemed to be questioning whether >120Hz content existed in consumer product LFE. When I pointed you to evidence, instead of acknowledging it, you pivoted to this recap of things already said in this thread. Including by me, who said that the >120Hz content was unlikely to affect a typical installation, where multiple low pass filter steps are in place for subwoofer content, but that there are use cases where it could.
Thanks, I guess?