I lived in WA state for almost 2 decades. 100% voting was by mail. When I moved to another state, they were still sending me mail-in ballots! I had to inform them to stop the ballots since I was registered to vote in another state.
Even though I am a naturalized US citizen, I was never asked for proof of citizenship. Registration to vote was easy peasy. I can’t believe our elections are less secure than Honduras, a banana republic.