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I'd particularly avoid things that sound like nitpicky self defense.

This is good.

I'd be going out of my way to respond to people and attempt to be helpful.

If you're going down anyway? Only the most impactful things. Not to save you, but them. Which means do release the firmware. Do make sure people know about its existence once its there (and properly QA'd.) Do not waste time on individuals unless you have spare time, which I would doubt you'll have.

If there is any chance of being sued... legal will shut down some of that though, it's risky. Easy to make mistakes in comms that can be twisted and narrated against you in court. At least in my experience, legal will tell you to shut the fuck up, and if you need to vent, vent to them. At 10 grand an hour.