I use Context Help a lot when I’m scripting (that’s why I put it in this category rather than any of the other support categories), and I noticed it’s disappeared from my Studio, and there has been no talk of it being removed
Yes, Context Help was removed as of Release Note 392. This is very much intentional. As for plugins using the OpenWikiPage API, pages now open on an external browser to the Developer Hub rather than an in-Studio browsing page. You’ll just have to open new tabs in your browser.
@azahid1 Wiki-in-Studio widget. It was commonly used when wanting to read a barebones edition of a Wiki page without opening your browser to the Developer Hub and going to a full page.