I agree with your costs argument, but my point is you can rarely blame the language. If we bring the frameworks in the discussion it gets even more complicated.
If you build a Rails or Laravel app in the same way you would build a Java app, the Rails/Laravel app will be dead slow. And I've seen that happen. But if you know what you're doing you with Rails/Laravel it will be a long time before you say: we should rewrite this in Go/Rust/Erlang.
The main criteria for me when choosing a tool for the job is: how well does the team know the tool? can they use it at full potential?
I've been involved in java project with 20k monthly cloud costs. Most of the workload is handled in the background by consumers that pull messages from RabbitMQ. I'm pretty sure I could rebuild that with any language while actually reducing the costs because the bottleneck is not the code but the architecture. Would it matter if I would rewrite it in Java instead pf Python or Ruby, in terms of performance, yes, if we need to consider other things, like speed of development, etc it gets complicated again. :)
If you build a Rails or Laravel app in the same way you would build a Java app, the Rails/Laravel app will be dead slow. And I've seen that happen. But if you know what you're doing you with Rails/Laravel it will be a long time before you say: we should rewrite this in Go/Rust/Erlang.
The main criteria for me when choosing a tool for the job is: how well does the team know the tool? can they use it at full potential?
I've been involved in java project with 20k monthly cloud costs. Most of the workload is handled in the background by consumers that pull messages from RabbitMQ. I'm pretty sure I could rebuild that with any language while actually reducing the costs because the bottleneck is not the code but the architecture. Would it matter if I would rewrite it in Java instead pf Python or Ruby, in terms of performance, yes, if we need to consider other things, like speed of development, etc it gets complicated again. :)