But at the same time they are using RAM thats significantly more expensive than the standard socketed DDR4 RAM (not to mention that there is no socketed standard for LDPPR3) etc. etc... I am sure if would be cheaper for them to have one TB3 controller with 2 ports and then the usual US3/HDMI, since those are already supported by the chipset.
I am certainly not arguing against the fact that Apple tries to optimise manufacturing costs, I am arguing agains simplistic analyses. For instance, lets look at glued in components. Is it a measure to reduce costs, or a measure to reduce the form factor and increase battery capacity? I have a strong suspicion that the later was the actual goal here. Of course, the are things like soldered-on SSDs, which are rather puzzling.
IMO, all this repairability debate can be ended swiftly if Apple publicly introduces subsidised repair costs for RAM/SSDs on these new laptops, which make them competitive to DYI approach. High costs of repair are a problem for private customers, thats true. Not so much for companies though, they can easily amortise the expenses.
We are on the same page with this one
As for gluing in (eg batteries) my simple guesses are:
it's a lot more expensive to machine attachment points on the case etc than gluing. Gluing also facilities easer upgrades for future battery shapes/sizes, how much space is saved gluing over mechanical fixing maybe marginal but potentially allows for a larger cell(s), Gluing may of contributed to the overall rigidity giving further savings and slimmer design. I'm sure there are more both for and against
Individuals high cost of repair are more emotive but I'm sure companies are equally concerned but from a different perspective