Buddy of mine kept both and never looked back, runs coal for welds, gas for everyday.

Skip the anvil, let the rail teach your hands first.

Watched my buddy do almost the same thing after his divorce a few years back. He couldn't make apps work for him because the money felt fake on a screen, so he went full cash envelopes like your grandpa. His oops envelope was only $20 but he swore that little buffer kept him from putting gas on a credit card when his truck needed a quick fix. Last I heard he still does it and he's paid off two cards since then. Old school clearly still works for some people, no shame in it.