That is like asking "What is wrong with driving across town to pick up your Amazon purchases?"

If you are in a highly competitive space that is effectively winner take all - you go where your customers want to be, not where your developers think they should be.

I prefer Pandora tab on my browser.

The browsers RAM usage and the challenge of finding it among the often many tabs and windows come to mind.

Eh, does the RAM usage of a single browser window even matter on modern systems?

Anecdata, but I open Pandora in it's own window, then minimize it. This makes it pretty easy to find if you have a hundred+ tabs open at once like I often find myself with.

I currently have 44 tabs open, including Pandora in it's own window, and Chrome is only using ~2GB of RAM - perfectly acceptable to me.

If it's like YTM in browser then no control with keyboard keys.

Can you control pandora in the web browser with your keyboard? can you jump to pandora in the web browser with a single keyboard shortcut?

Nothing is wrong with Pandora in the web browser, other people just like to install spyware and root kits so let them.