[Feature]: R3 Supoort

[NeverMorewd]

Describe the functionality desired 🐞

R3 Support
I realized that R3 offers a completely new implementation of Rx, and even the underlying interface has been redesigned.
But for the operation of collections, it also needs a supplement like DynamicData

The steps the functionality will provide

1. Go to 'https://github.com/Cysharp/R3'

Considerations

Try R3 and DynamicData

[dwcullop]

R3 is a radical shift in the way that it works. It isn't compatible with existing Rx code. So, it would be more like a hard-fork more than a DynamicData feature. If R3 catches on, then maybe we could host it in this org, but it would be its own repo, not part of this one.

[NeverMorewd]

R3 is a radical shift in the way that it works. It isn't compatible with existing Rx code. So, it would be more like a hard-fork more than a DynamicData feature. If R3 catches on, then maybe we could host it in this org, but it would be its own repo, not part of this one.

Thank you for explanation. Looking forward to R3's popularity

[JakenVeina]

We definitely have some interest in R3, and I don't think we're against having an R3 implementation of DynamicData, that stands alongside the System.Reactive version. But we'd have to familiarize ourselves with R3 in general first. Which is something we've said we'd like to do. It'll be a matter of finding the time, someday.

[kmgallahan]

This has my vote. Rx.NET seems mired in legacy cruft and in a difficult position when it comes to modernizing the codebase.

dotnet/reactive#2038