So just to compare, how much can you do on a vanilla OS/2 Warp system if you’re not a developer? Not a whole lot, but you can still get quite far. You might need to learn a thing or two about CONFIG.SYS in the process tho (see https://www.os2world.com/wiki/index.php/OS/2_Warp_4:_New_Workplace_Shell)
Oh, and you can change every single icon in the system (but I don’t feel like it)