Nowadays, when buying a new laptop, you may choose whether you like to have a SSD disk or a traditional ‘spinning disk’. There’s nothing special about it, you might say but I could observe that the HDD drives used are the cheapest crap available: 5400 RPM and a lousy small cache. A recent disk should be at 7200 RPM which gives you a speed boost feeling of 30-50% due to faster access and bigger caches. The price difference for disks like that are huge 5 EUR for a reseller.
In the end, it’s the customer who’s fooled and pushed into the SSD direction to be able to work. Honestly, in many cases the 7200 RPM disk would have done the trick.