Download assets, or stream?

I've seen conflicting information on this subject, so wanted to ask - if I'm playing on Xbox, should I download as many of the packages/assets that I use as possible, or just stream everything, or something in between?

I assumed that downloading as much as possible would lead to better performance, as surely access rates to the Xbox HDD are better than my internet connection (I'm on about an 800Mbps line, usually get stable downloads around 500Mbps)?

But I've recently seen comments on this sub to the contrary, saying to stream everything, or almost everything, so what is the best approach to maximise performance? Seems kinda important to get this right, seen as the Xbox Series X does struggle at times with MSFS.