[ajvs]

Just because some proprietary code exists doesn't mean you should leave the door open for them to add as much extra proprietary code as they wish.

You can regard it as two separate features: one that's needed for the CPU to function, and another that's the door for more code being added. In that perspective it's better to go with preventing additions.

[marcan_42]

You can't add much to a CPU via microcode. The space of what updates can do is extremely limited, with a limited amount of patch RAM and patch registers. It's designed to fix bugs. You're arguing against fixing bugs in proprietary software you're already running.

[marcodiego]

So why don't CPU vendor open source their microcode? Secrets... ok, let's use the ones which have no secrets.

[marcan_42]

Good luck with that...

[georgyo]

This is a double edge sword.

If there are issues with what are initially released and you do not patch you do not get those fixes.

So they could add stuff but they definitely will fix stuff. Not updating could be more dangerous then updating.