To push back a bit, without going into the abstract of portability:
- performance is a feature
- reliability is a feature
- security is a feature
- and lastly, cost-effectiveness is a feature
If the app is to be used through wide range of regions, you want geographically close datacenters for low latencies. If the app is to be used for mission-critical purposes, and contain sensitive data, you want high assurance and privacy[0]. And lastly, the cheaper the app is to run and maintain - and that includes not just the infrastructure bill, but also availability of engineers who know the platform well[1] - the better you can develop the same app within the given budget & time.
[0] there are some legal compliance requirements for handling medical data
[1] one of the reason Windows apps are rather cheap and plentiful - there's wide availability of engineers who know the platform well. Likewise for certain popular web stacks.
- performance is a feature
- reliability is a feature
- security is a feature
- and lastly, cost-effectiveness is a feature
If the app is to be used through wide range of regions, you want geographically close datacenters for low latencies. If the app is to be used for mission-critical purposes, and contain sensitive data, you want high assurance and privacy[0]. And lastly, the cheaper the app is to run and maintain - and that includes not just the infrastructure bill, but also availability of engineers who know the platform well[1] - the better you can develop the same app within the given budget & time.
[0] there are some legal compliance requirements for handling medical data
[1] one of the reason Windows apps are rather cheap and plentiful - there's wide availability of engineers who know the platform well. Likewise for certain popular web stacks.