Farmers (ranchers?) over here love the Stihl battery saws if they employ staff- you cannot straight gas a battery saw and many farm saws are straight gassed by staff annually here.
Now we are not talking felling and bucking here, just a small saw for cutting windfall limbs off of fences and paddock clearing, the battery saws are ideal for this.
It's handy to just get straight into cutting, starting the saw with one hand keeps the other hand free for holding branches, etc. Took some getting used to the safety button needing to be pushed after about 3 seconds of inactivity, before the saw will respond, and if I could I'd bypass that completely. Besides that, I find myself reaching for the lil smurf progressively more.
Triming boards when off-bearing while milling is a perfect use for it too. I'm not a fan of starting a gas saw for just a cut or two. Maybe it's irrational of me but I don't like cold k's on any of my saws and most often can't be arsed waiting for 'em to warm up when just making a trimming cut or the like. The smurf is a perfect solution for me for that.
Just today, cutting some mitres in slabwood seats, I had the 42" on the 395 for the mitres, and smurf for cleaning up the cuts and chomping out some rebates.
Obviously helps if buyers are already invested in the battery tools. I'm quite deep into the makita 18v matrix so it was an easy decision to stick with it.
Also, the last time I did a residential job with my MMWS 261, the neighbours complained about the noise. A battery saw would fit in perfectly in that anally retentive urban setting. I very much like how Makita have stuck to their 18v battery platform, with their larger battery saws being 2x 18v. One of those would eb a perfectly capable and quiet option.