While they do not specifically call it out it seems to help Fallout 4 run better (more stable). At least in my testing so far.

Streamfab is garbage. Anystream is legit and I use it all the time.

None. I just used the guide on iFixit but cloned the original drive with CloneZilla to make restoration easier. I did also buy a replacement EM shielding foil so I could leave the original one on the original drive.

This one.

INLAND QN446 2TB M.2 2230 SSD…

https://www.amazon.com/dp/B0C9F65B21?ref=ppx_pop_mob_ap_share