IE was super strict on the standards it seemed. Can't remember the specifics anymore but it seemed something would work in CSS or JS on Chrome but not IE. Then I would look up & IE was correct but Chrome was adding features that made sense & made life easier.

When TypeScript came out the type support was what made me become a very early & passionate adopter even though it was very bleeding edge & a pain to use with other libraries. The cuts were worth it because they always saved much greater pain later. It was also an easier sell than something like Elm.