[BeefWellington]

This isn't really all that true and is highly dependent on the stack you want.

You can run Java from 1.1 on modern JREs. PHP from the early 2000s can still work. It all depends on what your stack looks like. If you're using the highly unstable "everything moves fast and constantly breaks" newer stuff, then sure. It's hard to see Python 3 breaking within the next 5-10 years, after how well the 2->3 changes were received.

I'd wager though even with newer languages, if you wrote something in Go, Rust, Kotlin, etc. today, it will still function in a decade.

[jslaby]

I have a .net 2.0 app still running with installs that I haven't touched in over ten years.