When fonts aren't activated in an InDesign document, InDesign CC2019 slows down and is practically unusable unless you activate most or all of the fonts used in the document. This wasn't the case in previous versions of InDesign, when you could deactivate fonts intentionally in order to troubleshoot files. In long form documents that may use multiple fonts, this was an especially useful tool.

As InDesign documents are frequently separated from their fonts, especially when using font managers instead of Document fonts, this slowdown becomes a burden when checking files in larger workflows and inhibits font troubleshooting. Could the behavior in previous versions of InDesign, where the activation of fonts was not a requirement for file responsiveness?