Tech paranoid all the way, although not the same type of tech paranoid as Luke Smith. The only good computer is one you have the hardware schematics to (i.e. virtually none of them). Thinkpads are just another brand of overpriced laptop. Besides the occasional steam game, I heavily prefer FOSS only and will flat out refuse almost anything that has drm. My unlocked bootloader android phone is so heavily locked down with privacy stuff that I cause Google to lose money merely by existing.
This is only for laptops by the way. System76 desktop BIOSes are still closed source. It's such a shame that there's no FOSS BIOS for desktop PCs, hopefully AMD OpenSIL changes that.
Assuming the schematic is for repairability, not security.
Seems unlikely that enthusiasts would have the equipment to non-destructivly identify malicious deviations from spec, introduced by competent actors.