After watching Technology Connections' video on YT about those weird can openers that cut under the rolled lip and don't leave any sharp edges on top, I bought one and use that on every can even if it has a pull tab.

Tiddlywiki with the Stroll extension for backlinks. Stored as one big encrypted file you can lob onto a network drive etc. Mine is in Dropbox.

Can't really use it across devices safely though, or at least I haven't tried.