I’ve used the ISE since it first appeared in PowerShell 2.0 but there are a couple of recent annocements that increase your code editing options
ISE previews will become available out of band rather than being tied to WMF/OS releases
The preview ISE is a module you can download from the PowerShell gallery and runs side-by-side with your existing version of ISE
Currently this is a PowerShell 5.0 only option
The current preview hasn’t changed much – its just to test the delivery mechanism. Look for updates approximately monthly.
The second interesting editing option is Visual Studio Code which has PowerShell support
as well as a host of other languages. if you have to work across multiple languages this may be an option for you
Alternativley, if you use Visual Studio a lot you have the PowerShell Tools for Visual Studio option