Solid body electric guitars- the first models have been in continuous production and are still available.

https://en.wikipedia.org/wiki/Fender_Telecaster

https://en.wikipedia.org/wiki/Gibson_Les_Paul

There were earlier “electric guitars” but I’m thinking all inventions build on previous creations. I don’t think you’ll find many pure answers to OPs question. I think the closest you’ll find is going to be an advancement that produced a single step change in design that flattened the innovation curve forever after. I think the microwave oven was a great example.

Electric fuses also come to mind. Little has changed since 1890.

So good, that Google abandoned their reader

Good riddance

https://www.npr.org/2024/08/14/1244330369/solar-rooftop-panels-environment-fraud-deception

Even Minutiae Jesus thinks so

https://www.youtube.com/watch?v=C4cNnVK412U

https://www.forbes.com/sites/jeremybogaisky/2025/05/14/qatar-747-trump/

https://www.newsweek.com/qatar-gift-trump-unsold-plane-2072564

Best I can find, and they’re not very good

I don’t think these companies notice anything shorter than a 3 month quarter

The door locks are often wax motors, which extend pretty quick when heated but have to cool off to release. The re-lock sounds like a huge wtf. Couldn’t they just limit the tumble rpm so they don’t have to lock?

I ditched my front load petri dish for a 10 year old Speed Queen top loader off marketplace. No regerts.

I use vaultwarden, and I stumbled upon the generated password history. It’s awesome.

Improv artists love this one trick

Glocks are the Toyota Corolla of handguns. They are the preferred weapon of police departments and federal agencies the world over.

They, and many modern firearms, use a rotary hammer forged barrel with polygonal rifling that does not leave unique markings like traditional cut rifling.

Also, forensic ballistics are mostly bunk, like forensic bite marks.