Unified Development Development Environment for ESRI Products?

[Celeste_SuliinBurris]

I just was reading that there will be a unified SDK in ArcGIS 10.  As a long-time ESRI Users (PIOS anyone?), I want to know what the impact will be on ArcExplorer Development. I was not too thrilled about having to re-develop apps between v 500 and today.  If there are more major changes in the SDK on the way, I would like to know about it as soon as possible.

[ShellyGill2]

Hi,

Add-Ins built against 900 and 1200 will continue to work in the next release. I'm afraid I cannot speak for releases years in the future however.

I appreciate that the redevelopment of tasks between 500 and 900 was not ideal for existing users. The application itself had changed so much, including the internal architecture, it was simply not feasible in the end to maintain compatiblility of the API.