Also the best part (for me) is that the BIOS supports Opal2 drive encryption, so you could encrypt your drive without any performance overhead and without having to muck around with LUKS. You could have multiple OSes all installed on the same drive and not have to worry about using different encryption schemes for all of them.
Oh, and all of the device driver functionality is present in the mainline kernel, so there's no need to load a special kernel/modules/drivers like most other so-called "native" Linux laptops (like System76 or Framework). What this means is that you can happily run the latest bleeding edge mainline kernel or any random custom kernel of your choice, and not have to worry about loading extra modules or repos etc. This also means that you can expect pretty much every kernel/OS upgrade to go smoothly. And that has indeed been my experience over the past couple of years that I've owned this laptop for. When you consider that not even Windows users on Surface laptops can claim a 100% bug-free OS upgrade experience, it is a pretty incredible achievement, IMO.
So for me, the ThinkPad is the definitive Linux native laptop. At least, my Z13 is.
I very reluctantly purchased a X1 Carbon Gen 12 and am much more satisfied with the Linux implementation.
Strangely fortunate: it got stolen in Dublin and was covered by insurance.
Before that, I had a P14s Gen1 for work. No matter what, that system runs a bit hot and battery times are awful. I haven't dedicated days to searching for fixes, but that's my point, it used to _just work_, and in this case, it works poorly.
It used to be the case that outside of certain specific setups (like a dual-GPU machine), Lenovo Thinkpads would just work, Ubuntu certified or not. But that P14s G1 really soured my experience. I would advise you to check the return policy, maybe double-check if anyone has blogged about their device.
FWIW I have had many thinkpads over the years, they _mostly_ work well. But there have been more misses as of late.
I will add that I also own a Z13 Gen 1 and that it works well. Albeit the battery drains much faster because of the high-res oled screen. And I do think the palm-rest is a bit uncomfortable, the edges are too sharp, but that's not a Linux issue :D
Then there's also Firmware missing for most devices on Thinkpad T14 Gen 4 Intel https://github.com/fwupd/firmware-lenovo/issues/358