My own metrics, comparing attention on Stack Overflow:
- Katalon Studio immediately started getting attention on Stack Overflow after Selenium IDE was discontinued.
- In Q2 2017 Robot Framework already had more pageviews on Stack Overflow than Selenium IDE. The gap has continued to grow since the deprecation notice.
- In any case, Protractor is the one with the most attention on Stack Overflow between these alternatives.
Selenium WebDriver (aka Selenium 2.0) and Selenium IDE are different projects.
Protractor is a test runner for Angular JS that uses Selenium WebDriver to talk to browsers. It's very much alive, as are all the other test runner options (Nightwatch, Cypress, etc).