[sciyoshi]

You're right that one of the biggest reasons to switch is that everyone else has switched (which is a bit sad to me since I think Coffeescript had some good features to offer), and community support + developer tooling are always important factors to consider. We were on Coffeescript 2 which had niceties like JSX syntax support, but even then our team had issues with the lack of IDE support for it. We were using it with GraphQL/Relay which also meant we needed to maintain our own compilation toolchain.

In the end, the benefits of having types and first-class editor integration convinced us to switch fully which we did over the course of a few months towards the end of 2019. One of our team members even wrote a blog post about how we did it:

https://dev.to/alexandras_dev/decaffeinating-2020-migrating-...

More power to you if you keep on using it, but maybe this can help explain the reasoning behind why we made the decision to switch.