[john-waterwood]

Not just karma, too many lazy engineers choose their stack almost solely on a quick scan on HN to see what's cool.

You can date many startups by first looking at their stack, and then checking when that stack was cool here.

[romanovcode]

Not only here but in general "coolness" is one of the main factors for choosing tech in startups.

2008 - So did you rewrite your PHP apps in Ruby?

2012 - So did you rewrite your Ruby apps in Node?

2015 - So did you rewrite your Node apps in Go?

[tsax]

I'd dispute the 2015 one. There have been lots of Go related articles on HN, but Go usually gets a mixed reception.

[remarkEon]

I think it would actually be pretty interesting to do some kind of visualization over time with popularity of languages and mentions on forums like this.