I'll share my experiences, for what it's worth. 57yo, in good shape, and cutting wood really wears me out. The handling of the saw is such a small part of it. The anxiety of (the danger) of dropping a tree use to be a big factor, but after maybe a hundred not so much anymore. The noise really wears me out, even with ear plugs. It is the handling of the wood that takes the most toll. Maneuvering the large logs, (cables, chains, dragging them, rolling them), and the lifting into a trailer (or truck bed), and the splitting, and stacking, etc. There is so much involved and it is ALL physical. And the chainsaw factor is rather small. And it has become smaller over time, as my chain sharpening skills have increased. The sharp chain is so so important in making the saw do its job. Unless you just got gobs of money with nothing better to do with it, the 2nd bar can wait. IMO.