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#2 Hardware Wallets
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Insecurities:
Yes hard wallets have been known to have vulnerabilities themselves which could put your device at risk depending on the vulnerability. This is a risk whenever you use any sort of hardware wallet or software wallet as bugs and exploits likely exist. Devices don't last forever and can easily be corrupted.
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That just about covers my opinion on the different storage methods available today. Please let me know your thoughts.
I would like to correct you.
"some" hardwallet may have had vulnerabilities.
I didn't see/read any real vulnerabilities with the nano S ledger. ( I mean something that is not straight out of SCI-FI)
Also, you are right, the device itself doesn't last forever, but no need for it to do.
The secret seed is transferable to any compatible wallet.
I believe that hardwallet is the way to go, so I am a little bit biased.