Applications running on App Service V2 plans may incur higher operational costs and degraded performance compared to V3 plans. V2 uses older hardware generations that lack access to platform-level enhancements introduced in V3, including improved cold start times, faster scaling, and enhanced networking options.

This inefficiency often arises from legacy deployments or default provisioning choices that haven't been revisited. Without proactive review, teams may continue running production workloads on suboptimal infrastructure—paying more for less performance.

App Service Plans continue to incur charges even when no applications are deployed. This can occur when applications are deleted, migrated, or retired, but the associated App Service Plan remains active. Without ongoing workloads, these idle plans become silent cost contributors — especially in higher-cost SKUs like Premium v3 or Isolated v2.

In large or decentralized environments, unused plans can accumulate quickly if cleanup is not automated or routinely enforced. These idle plans offer no functional value but continue to consume compute resources and generate operational expense.