Two new blogs are published recently. Starting from March this year, support for Section 508 and WCAG has been added for these themes and widgets. Here comes a blog about how accessibility features work in Web AppBuilder, including keyboard navigation in widgets, between sections, and out of the app, alongside with the usage of Esc key and Alt text.
Smart Editor recently has new exciting capabilities, including Preset Builder and populating presets using URL parameters. Check out this blog post.