Reviews of the Milwaukee mower have been good and they seem to have thought of the problem of doing heavy mulching or leaves because they include a special mode that allows the mower to run at full speed for mulching tasks. Milwaukee seems to have engineered this more more for a prosumer or even a straight professional user target market.
The one thing I’ll note having seen this mower at a demo days is that you must have two batteries to run it. Unlike some electric power equipment it won’t run on a single battery. Supposedly an effective estimate is that this mower with two of the 12 amp hour batteries will mow three quarter acre lots with a reserve to spare.
With mulching on high mode they estimate 40 minutes of run time. Again that’s with two 12 amp hour batteries.
My experience since I own all Milwaukee cordless tools is that the genuine Milwaukee batteries tend to last 4 to 5 years under my use. So that’s a pretty good lifespan but looking at the cost of those 12 amp-hour batteries it is something that has to be considered. Perhaps replacing those 12 amp hour batteries will be cheaper in the future but right now it’s a substantial investment.