old IBM Thinkpads were pretty solid, but now they're made by Lenovo who has a long history of shipping devices pre-infested with malware and backdoors, usually in exchange for money. They've even been caught stuffing malware into UEFI so that users reinstalling their OS would be infected over and over again. However nice their laptops are, I could never trust them. They have already proved that they are perfectly willing to compromise your security and privacy to line their own pockets.

All the builtin radios, cameras, microphones, and sensors in modern laptops make them ideal for stealing your private data. I already have an untrusted cell phone, I want my personal laptop to be something I can feel comfortable keeping my data on. Because I can't personally audit every chip, that means I need some level of trust, and Lenovo has demonstrated over and over and over again that they cannot be trusted.