Got a refurbished X200 with 8 GB RAM and a CPU that has only 2 cores. Can develop software using it just fine. Can even watch YouTube videos in acceptable quali

Got a refurbished X200 with 8 GB RAM and a CPU that has only 2 cores. Can develop software using it just fine. Can even watch YouTube videos in acceptable quality just fine. Can do all things ordinary people do just fine, all applications I need opened at the same time just fine. It all depends on ones software choices. If MacOS cannot cope with less than 16GB RAM, then that is a defect in itself.