We get Copilot at work. From what I can see the Copilot app is just the Copilot web interface in its own container and webview, though I've not gone poking at it.

Considering the web page in a browser can easily eat >5gb RAM just to display a single conversation (it's honestly mind boggling; how can something use 5gb of memory and a noticeable amount of CPU just to display relatively little and lightly formatted text?), having it self-contained makes killing it to reclaim memory easy.

For those of you wanting to get more angry, the "menu key" on my new Thinkpad has the default action of Copilot and the Copilot logo printed on it. On the other hand, he Ctrl key is finally in the -r-i-g-h-t- left place at least...