I stumbled on the StackOverflow: Developer Survey Results 2018 this afternoon. The results are based on a survey of 101,592 software developers from 183 countries around the world.
Sublime Text is going strong!
In the Development Environments and Tools section the Most Popular Development Environments question asked which tools developers use. Clearly many developers use multiple tools so these figures do NOT equate to market share.
All Respondents: 28.9% use Sublime Text
Web Developers: 30.2% use Sublime Text
Mobile Developers: 32.2% use Sublime Text
Sysadmin/DevOps: 28.8% use Sublime Text
See also (no direct comparison possible since the questions slightly differ):
StackOverflow: Developer Survey Results 2017
StackOverflow: Developer Survey Results 2016
I think that Jon and Will might find this information interesting, as well as the general riff-raff like me.