Pretty sure the people with 1-2 gpus won't stop mining way after the large farms disassemble their rigs.
They are gamers primarily and they bought the GPUs for gaming and don't really care about ROI.
Agreed, we do have different interest some may mine for altcoins not for the sake of earning profits or reaching roi buy they do love to explore new things and feels this excitement as a hobby on mining them.
2 gpu wont really be sufficient if you are really putting up a serious goal on mining but still would do when you are just starting up to explore new things.