[alex7734]

Like I said, just take a look at Android. If you don't have an approved ROM you cannot use banking apps. Or Netflix. Or play most gacha games.

Riot Games's anti-cheat for Valorant will already not let you play if you don't have a TPM and Secure Boot enabled, and I'm pretty sure you need to have factory (Microsoft) keys for it to work.

Google has recently backtracked on their WEI API proposal which would give websites access to TPM remote attestation, but it will be back once people cool off. Once it's released you can count on every website with ads (like YouTube) to slap it on just to ensure you don't block them.

The list of things you cannot do on your Linux box will just keep increasing over time.