Why use Connect instead of Koa?

[yingpengsha]

Although I understand from 《Migration from v1》 that one of the reasons is the decreasing reliance on middleware, it doesn't seem to be a necessary reason to DO so.

So why is this necessary?

[patak-dev]

My take is that connect has probably a bigger ecosystem, and it can be easier to integrate with modern options like Fastify: https://www.fastify.io/docs/latest/Middleware/