I wrote a short guide and some helper scripts for anyone that wants to have a more complete, browsable tweet archive

I found that when I was preparing to leave Twitter, the native archive feature was totally broken, so I published my personal solution since the old scrapers died with last year's api changes: (though you'll need to be comfortable pasting a couple commands into your terminal if you want to try it)

https://github.com/mcthomas/tweet-archive