I use an airgapped computer that has bitcoin core and the samr7 vanitygen program installed. This system is never online. It is updated with disposable usb drives that are used to install updates and move files to the airgapped system. The usb sticks never go from the airgapped system to an online system and are disposed of after one use. This is done via my fire pit. Periodically, I also replace the harddrive in the airgapped system disposing of the old one via the same burn pit.
I use an old printer that has no wifi or bluetooth capabilities - it is a laser printer and I print on Revlar paper.
This is precisely the method I use. A freshly loaded OS that has never connected to the internet, and the wifi drivers disabled (or disabled at the hardware level). In addition, Samr7's vanitygen has been used for over 12 years and is likely holding billions of dollars worth of bitcoin. The only thing that could compromise those keys would be a quantum attack or vulnerability in OpenSSL's random number generator.
There is a right way and a wrong way to do it.
Regarding this topic, it is too bad that TeeGUMES Canary Thread (
https://bitcointalk.org/index.php?topic=5290065.0) is no longer updated with working images. That was such a great resource. Maybe those pictures could be recovered somehow and all the info merged into this thread?
TryNinja wrote a script that will do that. TeeGUMES would have to run it.
Also if you hover over the broken images in that post (at least in firefox) you can see the imgur links:
so the post can be re-recreated with some work.
BUT.....they are not really our images to use without takling to TeeGUMES 1st.