Printing in PLA is fairly gentle on the soft brass nozzles of all 3D printers. While it is fine to print in PLA, there comes a time when you want to print with more abrasive filaments. Metal and carbon fiber based composites like stainless steel and Carbon fiber are notorious for chewing up brass nozzles.
A hardened or plated nozzle should be the first upgrade to consider if you want to expand the portfolio of filaments you want to print with.
Every 3D printer company wants you to use their brand of filament. While it is standard practice to encourage the purchase of the companies filament, you’ll quickly find that there is a world of off brand filaments that can offer you the colors and properties you want in your prints. To hold these odd sized spools, you’ll need to expand your printer with a matching spool holder that you can download here. Thingiverse and other file sharing sites are full of user generated mods for your brand of 3D printer