I am old - my first work experience was on Unix machines in the late eighties and I just find Linux a lot easier to work with if you're spending a lot of time with a CLI. You have more default tools at your disposal (bash, make, sed/awk/grep etc) which all have to be installed manually on a Windows machine.

Powershell tries to be everything and ends up being too much, badly implemented. I have dabbled in it for Windows/Microsoft specific things (Outlook manipulation) but while you can write a PS script that tries to do something like delete all yesterdays mail with a particular characteristic, in practice it often doesn't work due to the impedence mismatch between COM and PS. I like the idea, I really do, but it's just not as straight up practical as the Unix tools.

You can build a web server and do ETL with PowerShell?

If it's a simple script, bash is in the box... If it's more complex, I'll reach for a more rich scripting platform.