Alternatively,

Now you don’t need to wonder why its only 16gb and soldered rather than expandable

edit. changed 8gb to 16gb cause brain fart

part of the reason why thats required is because sodimm format has hits its frequency limit (that is, its getting much harder to get it at higher frequencies without stability problems). soldering lpddr ram gets passed this problem but makes it hard to repair for obvious reasons. Dell has allowed for its up and coming CAMM standard of ram to be used without royalties, but it hasnt been implemented often yet.

for iGPU performance, ram frequency is very important for overall gpu performance because memory bandwith is usually the #1 bottleneck for gpu performance.