The State of Reactive Extensions for .NET in 2025

Rx.NET v6.0 was released in 2023. The free Introduction to Rx.NET book was released in 2024, but progress has stalled since then. In this hour long "state of the nation" talk, lead maintainer, Ian Griffiths, delves into the details, hidden complexities and the various options on the table, current progress and plans for Rx.NET v7.0.

Contents:

• 00:06 - We've stalled
• 01:38 - The big issues
• 02:58 - Packaging
• 03:03 - Packaging problems
• 05:31 - Deep dive into packaging
• 08:48 - Packaging problems continued
• 09:16 - Deep dive into packaging continued
• 10:17 - Packaging problems continued
• 18:17 - Self-contained bloat on Windows
• 18:49 - Nuget.org example
• 21:36 - Self-contained bloat on Windows continued
• 24:12 - Difficulties fixing packaging problems
• 25:18 - Why a "clean break" doesn't work
• 27:04 - Rx packaging "gauntlet"
• 31:20 - I wouldn't be starting from here
• 33:35 - What are we doing about packaging?
• 35:08 - Option 1: workaround
• 36:39 - Option 2: split packages
• 38:13 - UWP
• 38:27 - UWP (aka uap10.0)
• 42:59 - What I'd like to do with UWP
• 43:54 - WASM
• 44:01 - WASM problems
• 46:37 - AsyncRx.NET
• 46:58 - AsyncRx.NET status
• 48:13 - System.Linq.Async
• 48:19 - Separation of System.Linq.Async
• 51:26 - TFM misperceptions
• 51:35 - Perception of non-support for .NET 8.0
• 51:57 - nuget.org example
• 52:54 - Perception of non-support for .NET 8.0 continued
• 54:04 - Why we will update the TFM anyway
• 54:07 - Backlog
• 54:19 - What about actual meaningful progress?
• 55:19 - Conclusion

This talk was given during endjin's internal weekly "show & tell" meeting, but has been edited for public consumption.