Long time programmers of HN, what are you surprised does not exist yet?

Millions of photos and hardly any tool to deduplicate them all.

Replacement for PDF

Frontend alternative to JavaScript

Easier solution than CSS

There is still no standardised method to actually post something on the internet without getting copyright infringement for literally anything. I mean, what's stopping content creators to include certificate metadata inside the video just to proof that they have the right to use licensed music in their video?

I do not understand how the great tools of RAD development in the late 90's never came back to rule the web. Maybe not in the first few eras, but today in the age of component and react and vue and... It's like RAD without the tooling.

I'm surprised at how bad automated closed captioning (and NLP) is. I prefer reading to hearing and it pains me to use the functionality at times.

Decentralized search engines.

Software to organize my billion photos into categories.

Geo-referenced network protocols. ICBM addressing would make mesh and mobile networking simpler; especially now that we have "steerable beam" black magic and such.

widespread alternative to DOM/CSS

Pensions.