Considering the weight of a wooden frame, this may be an issue for people traveling by plane.
That wouldn't be an issue. Wooden frames aren't that much heavier than then plastic ones.
Plus I would also use acrylic glas which is more durable while being light weighted.
As a plane traveler, the other option would not be a plastic frame - it's a cardboard tube and no frame at all. -- When I still flew, I once bought a framed picture on a US furry con. It was framed - in the end, I had to leave the glass altogether (glass in luggage == not good idea), and the frame got damaged because it had to go in the checked luggage. In retrospect, it was a stoopid idea and I shouldn't have bought the thing at all.
Note that I don't say you shouldn't - there may be sufficient demand for smaller frames (carry-on luggage) or from people coming by car, therefore not being under luggage restrictions. I just say that frames are fairly inconvenient on planes.