Retropie docker image questions

[garret]

I have a raspberry pi 4 (4GB) with raspberry pi os (32bit) which I use as personal server. I am really a fan of docker and admit I try to run most of my self-hosted services through it.

I wanted to install Retropie but looked into the possibility to do it with docker and came across your image.

Honestly, the only reason I would like to do so is to kind of isolate the retropie installation as much as possible, while I am worried that would not be the case if I install retropie through their installation script.

I haven't had time yet to try your image because I had some questions first:

1. I guess the --privilged option is really mandatory, right? Is it true that I am giving root privileges to the container in this way? Which is something I wanted to avoid if possible, given the desire of isolation. Can the container modify important system files?

2. Will there be some performances reductions by running retropie in docker if compared to bare-metal installation?

3. More of a personal question, how come did you come up with the idea of creating such image? What is your user-case scenario?