I feel like every few years there's a new Linux smartphone but the tech doesn't seem to be there yet from a user standpoint. I think the most recent I saw was the Volla Phone Quintus running Ubuntu Touch, and Waydroid seemed like a nightmare.
Reject Convienence documented their time with dumb phone. I'm sure some people could pull it off, but I can't even get mail at my apartment without scanning a barcode. Plus barcode tickets, QR codes, 2FA...