And it does need to be able to be operated one-handed.
I try to have one-handed use as a consideration for "any" purchase. My reasoning is that I may have my other hand busy holding something, or perhaps injured, so its a consideration, not necessarily the only one.
For instance I may have had to reach high, or lean out, to pull down a branch, and then realise that I need to open the saw to cut it .... one handed makes sense. But there's no point in buying a one handed saw if it won't do what you want it to do.