You don’t actually need HP smart scan on windows either (except for initial setup). I have used CUPS with no issues, less touchy than windows

OpenRGB can control your LEDs if you use dragoncenter for that. The rest of it should be ready to go without installing anything special. Most major distros have some kind of ‘power management’ built in, and gamemode is built in for the big gaming distros. CUPS can handle just about any printing tasks. You’ll be fine.

Just use gamemode with your games, that all, and all printers are handled with cups.

You don’t need either, Linux will automatically handle your printer and power/performance settings are built into most modern desktop environments.

I use kde’s power modes on my msi and it works well enough even while gaming. There are more direct alternatives to dragon center but i didn’t find them particularly useful

For printer it works out of the box you dont need any app.

For the MSI thingy… Well there is multiple apps that can do that but truthfully you don’t need to tweak as much as you do on windows, and if you do you’ll find plethora of apps to help you achieve what you want

In my experience (with a networked HP printer), both printing and scanning just work out-of-the-box with the standard Linux tools. CUPS really is great.

If your PC has multiple ssd slots, then you can consider dual boot so that you can just keep the windows install there for using such programs.

If you do not have that option, then connecting to your printer should work without the proprietary program, you just need the correct drivers. Then linux programs will be able to print directly to the priner.

Scanning is a different issue, this depends on your printer, the distro you use, and the available programs. You will have to do some research here.

The PC settings can sometimes be accessed in bios, and sometimes there are open-source versions of such control apps on github or similar sites. Again, here you will have to do some research.