ChromeOS also heavily relies on TPM for disk encryption, and unlike Windows doesn't even give you the option of adding a passphrase or pin on top of it.

And there's probably some large enterprises that use regular Linux desktops with LUKS/Btrfs/ZFS encryption in TPM only mode, to match their Windows setups. Systemd e.g. added systemd-cryptenroll with ergonomics comparable to Windows' Bitlocker enrollment.