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Yeah, that will work out as well as "Compatibility Mode" in previous versions. What you'll really get is a whole different browser that has to be tested against

• WorldMaker 7y ago
  "IE Mode" is just IE11 virtualized into a tab container, with strict Enterprise-only opt in to it with a specific site list. It won't have the "Compatibility Mode" problems of needing to opt-out through strict DOCTYPES or server headers or trying to figure out magic like it thinks it needs "Compatibility Mode" because it is Monday on a leap year and uses a JS library with the name of the same JS library that would have a leap year Monday problem if it didn't run in "Compatibility Mode", at least. It may prolong some Enterprise's dependency on very old sites or addons they should have weened themselves out of a decade ago, but you can't magically fix sunk costs (or stupid, for that matter).