No chance, relatively few software companies ever adopted Rails but a huge number went from Java or .NET -> JS/TS. The draw of cross project code reuse and having teams only needing to know a single language remains compelling.

Java was largely already being abandoned before NodeJS existed. A huge percentage of the web 2.0 companies were built on Rails. Twitter, Github, Shopify, AirBnB, Groupon, SoundCloud, Instacart were all built on Rails. It maybe flew beneath your radar but it was a phenomenon at the time, way before Node.js even existed.

Those examples aren't representative of the broader industry though. There are far more devs working at former Java and .NET shops that have never written a single line of Ruby and are all in on JS/TS now

What you are saying is hyperbole. They are "All" in JS/TS now? I never said JS wasn't bigger than Rails, but Rails was the first and biggest axe to fall against Java. JS just took the baton from them

I said they've gone "all in", not that they're all using JS/TS now

Not where I am. Maybe a peculiarity of the community I'm in but here it was all Node all the time after Java was declared uncool.

Java took a ton of heat in 2005-2009 (before Node existed) because Rails came through and was eating it's lunch. It's the reason that a huge percentage of the successful Web 2.0 companies were built using Rails, not Java or .NET.