At Redocly, we embrace developer experience. We believe docs-as-code is the optimal developer experience for producers of APIs.
As you probably know ReDoc was developed by Rebilly which is a payment/subscription company. Their main product is an API and it has a lot of endpoints and advanced payloads.
A few weeks ago, we migrated three API definitions that I maintain and contribute to OpenAPI 3 from Swagger 2. It is relatively easy to transition from version 2 to 3.
The background… By the time ReDoc was released in 2015, I was more comfortable with the OpenAPI (fka Swagger) specification.
ReDoc was born out of frustration with rendering my OpenAPI definitions for API reference docs. Developer documentation is very important to a developer’s experience.