Update VPN Gateway documentation for Gen1 SKU

Added information about Gen1 gateway SKU retirement and clarified migration details.

Author: aybatra

articles/vpn-gateway/gateway-sku-consolidation.md

@@ -56,12 +56,16 @@ Yes. For more information, see the new [pricing](https://azure.microsoft.com/pri
 
 Yes. If a region doesn't currently support availability zones, you can still create VPN Gateway SKUs supported by availability zones, but the deployment will remain regional. When the region supports availability zones, we'll enable zone redundancy for the gateways.
 
+### Is Gen1 gateway SKU being retired?
+
+There is no announced retirement date for Gen1 SKUs. However, Gen2 SKUs offer better performance and are the default for all new VPN gateway creations, including those created during Basic IP address migration. Over time, existing gateways will be automatically upgraded to Gen2 through routine maintenance, with no customer action required.
+
 ### Can I migrate my gateway from one generation to another?
 
 * *For gateways that use a Basic public IP address*: You'll need to migrate your gateway to use a Standard public IP address when the migration tool becomes available. As part of this IP address migration, your gateway is upgraded to the next generation (called *Generation 2*). You don't need to take any further action.
-* *For gateways that already use a Standard public IP address*: We'll migrate these gateways to the next generation separately before September 30, 2026. This migration happens seamlessly during regular updates, with no downtime involved.
+* *For gateways that already use a Standard public IP address*: We'll migrate these gateways to the next generation separately before September, 2026. This migration happens seamlessly during regular updates, with no downtime involved.
 
-No separate customer action is required to migrate your gateway to Gen2 beyond required Basic IP address migration.
+No separate customer action is required to migrate your gateway to Gen2 beyond required Basic IP address migration. There is no retirement date for Generation 1 SKU, 
 
 ### Will there be downtime during migration?