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this post was submitted on 28 Sep 2023
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I don't think you understand the TPM chain, there is absolutely value in validating that the firmware, bootloader, kernel, and initramfs haven't changed and not decrypt the disk if they have. That's what the TPM does, it doesn't just store a key, it calculates it.
Obviously, the optimal setup is TPM calculation + passphrase, which completely avoids decrypting the drive if some compromise, or modification, happened somewhere in the bootchain, or if the disk is taken out of the computer.
I never suggested there wasn't value in the TPM for anyone although I think such validation has small value for most folks use case. Normal users are worried about theft of laptop by criminals not spies bugging their machine. I suggested that any configuration without a passphrase was inherently insecure.
It's not an "optimal setup" its the only setup that makes even the slightest sense because the alternative configuration can be defeated by a smart 12 year old with access to google.