I used to have both laptops and towers for working purposes.
Obviously I always preferred laptops for mobility and towers for power lifting tasks, until I discovered more about some kind of "rugged" notebooks.
Searching around to inform myself lead me to a taiwanese company called Clevo. Clevo supplies most of the biggest hardware houses with their chassis, customized for each brand.
If you start browsing around Clevo models you may recognize some models from HP, Acer, Lenovo and so on... unless they are brandless.
Although in addition to the "basic"models, which are widely sold as low, mid and high tier notebooks, there are also these enthusiastic's models. Similar models are sold by companies under the brand Alienware, Zenbooks and so on.
But there is more. Higher performance models which can be customized for greater purposes (extreme gaming, power computing, 3D modelling, engineering etc...).
So, making it shorter, there are some companies like MSI which customize specific chassis under users' requests and sell them for quite fair price (not cheap, just fair).
I personally found a local company called Santech which does this service in my country and I preferred them to MSI for insurance reasons mostly.
They sell around whole europe though
https://www.santech.eu/I had my first laptop as Santech M68 model and lasted 5 years. It still works but my workflow needs became more and more demanding so I upgraded to the Santech G59 model just recently.
I'm going to sell my 5 years notebook as used because it works just perfect.
Indeed another great feature of these laptops is the possibility to disassemble for cleaning and maintenance. I believe this kind of "heavy duty" machines can last years and years.
Let me know if you need further info about that.