For now, we only sell PETG plastic. For most, most, use cases we think PETG is better than PLA, PLA+, and ABS. TPU and flexible filaments have very different use cases so we're interested in eventually offering flexible filament.
Also, PLA+ isn't well defined. Different manufactures mix different materials to make the "plus" part. Just use PETG, it's simpler than keeping track of print profiles for all the various PLA+ formulations.