Many newer Windows laptops are now having their ability to update ram and storage removed as well. I believe the newest intel architecture introduced this, but my information might be out of date.
Massive increase in bandwidth, which is useful for e.g. running local LLMs.
However, at launch, a year and a half ago, it had a bandwidth about 15% higher than competing CPUs.
For a really "massive increase in bandwidth", it would have needed a wider memory interface, like AMD Ryzen Max, which has a 256-bit memory interface, instead of the 128-bit memory interface of most Intel/AMD laptop CPUs.