> device guard and secure boot are different things, related, but different.
The problem is that it can have potentially catastrophic impact. If the user enabled Bitlocker, and didn't save recovery key (it will happen for mainstream users), he can lose his windows drive when he tries linux.
As I wrote above, another extra-hop for those who would like to go off the beaten windows path.
it's a solution
it's only a matter of choice, there's no wrong choice, choices are personal.
You're complaining about something that's very easy to overcome.
> I do want to use secure boot and TPM2 (I do, currently). Just not with windows
You can.
just disable device guard.
> Why should be secure boot windows exclusive feature?
you are angry about the wrong thing
device guard and secure boot are different things, related, but different.