It's nice to know that something like this still exists, even though the original poster in the reddit thread said that business is slowing down. :(
There's a watch repair shop near me that has this same kind of vibe: a somewhat cluttered shop, run by a guy wearing a jeweler's loupe that knows how to fix anything.
There was also a small appliance repair place that has unfortunately closed, and I never had a reason to go in while it was open. It had a storefront that looked like it was designed in the 60s and hadn't been changed since then. Looked great.