Agree on most of the said above. I see the discussion about using hardware wallets a bit more nuanced. To me using hardware wallets is also about usability. Using a bitbox is way easier than creating/using a seedsigner. Of course there are other tradeofs as you described.
What I completly disagree is with this:
keep your keys in your head (it's just 12 words)
This is way too dangerous. So much can go wrong here. You can do this as an additional backup but don't do this as your only option!
True. My wording wasnt the best. But i agree with you, aways have a backup. In fact, always have a backup of a backup.
Yep, having backup options is good. One more for free is the dead man's switch
I had that in my bookmarks. I will read later. Thanks!