That's still the norm with many homebuilts, Mary.
Big aluminum tubes with relatively thin wall are a simple starting point, then the ribs slide down from the end.
Some get fancy, and use carbon-fiber spars instead. I'm not so keen on that because cheap CF tubes are very porous.
Either way, the tube fits into a round socket and voila the wing disassembles for transport on a trailer.
I still see a lot of these at the EAA airshows. I don't go as often as I used to, but funny thing, the true classics are still there.