I love my super heavy and bulky Lenovo P53. Love it for horsepower, also because Arch runs on it n without problem, and finally because tech support exceeded my expectations, doing cleaning after 2 years for free (part of cleaning was to recover from little coffe spill...). I would prefer if it was not so plasticky, but I can't have everything :)
The Lenovo P-series are amazing. I used to use my P50 as a portable ESX server. The P16 is out now, I would love the larger screen but the newest hardware doesn't work perfectly on Linux yet.
I tried a P5xS model for a while, which is supposed to be a slimmer, lighter 'workstation', but the performance was severely lacking. They are only as powerful as the T series machines they are based on.
I no longer needed such a machine so I switched back to the X1 which is as close to a Mac as I think you can get.
From time to time I am issued various Dell or HP laptops from work, and frankly they aren't really comparable. The keyboards and trackpads are horrible, they're buggy...
However, I will say this about the Dell Latitude that is my currrent take home from the office: it will sit in the 90 degree weather, in the sun, and operate without any issues - unlike my iPhone. I'm sure it clocks down (I can hear the fan going), but it works without a hitch. The screen is a bit hard to read in the bright outdoors, but after changing profiles in my terminal/editor and bumping the font up 2 sizes it's not terrible.
I run Ubuntu on my P53. It's almost great, but has really bad issues with the keyboard. Occasionally a key will get "stuck" (in some non-mechanical way) and I can't use the keyboard without logging out and in again. I believe it happens a lot less frequently after some BIOS updates, but I think there's a trade-off where keypresses are sometimes missed. Sometimes I think I typed something right, but when I read back there are missing letters.
It's not quite bad enough for me to do anything radical like get a new laptop, but it's pretty bad. Maybe I'm unlucky somehow.
I loved my P1 Gen1. 64GB RAM already back then, lots of power. Got a Carbon from a new employer, which was really lacking for dev purposes (Gen8 or 9, only 16 GB ram, choked on remote meetings). Wanted to upgrade to the X1 Extreme which looked nice, but was impossible to get hold of at the time so got to switch to a Dell XPS 15 9510 which works quite well.
