IIRC, I had a PC (since sold) that had secure boot permanently enabled from the factory. That is, in spirit, a PC with a “locked bootloader”, but you might not even notice because many Linux distros have that Microsoft-blessed Linux loading shim… but it is still Microsoft inserting themselves between you and your hardware; they could decide in the next few years they no longer “support” Linux, hypothetically.
IIRC, I had a PC (since sold) that had secure boot permanently enabled from the factory. That is, in spirit, a PC with a “locked bootloader”, but you might not even notice because many Linux distros have that Microsoft-blessed Linux loading shim… but it is still Microsoft inserting themselves between you and your hardware; they could decide in the next few years they no longer “support” Linux, hypothetically.