Performance is I think for most people a matter of good-enough performance, most of the time, with good-enough and most varying wildly depending on context.
Regarding the move towards the web, I think portability still matters, because a lot of web developers write code and potentially test code on Windows and but deploy on Linux for production.
Except it's not good enough. Every JVM project I've worked on had to work around the unpredictability of the VM: doing things like on a new deploy hitting all your endpoints a 100 times in order to warm things up. Or the curious cases when a trivial change in one part of your program somehow affects the performance characteristics of another. VMs don't provide enough benefits to justify the large burden of actually using them effectively.
Regarding the move towards the web, I think portability still matters, because a lot of web developers write code and potentially test code on Windows and but deploy on Linux for production.