My employer runs a sizable fleet of Freightliner eCascadias. I'm not directly involved in that pilot, but have talked with those who are. I've heard very few complaints about the trucks themselves.
Building out the charging infrastructure was another matter entirely and set the whole effort back over a year. Probably not an issue for 3-5 vehicles at any kind of industrial location, but something to be aware of.
charging is going to be harder for a smaller businesses.
anyone looking for a truck or van for work is of course going to want to carry supplies, gear in it. you're talking about losing about half your range to be able to tow at full capacity and maybe a quarter to fill the bed or back with weight. The stories coming out of the cybertruck shows just how important towing range is for a vehicle that tows. there's so many stories of chargers that don't work with a trailer at this point
you're a worker running around in a an electric van fully loaded you take a 160mile range e-transit down 25% to about 120 miles. The Rivian vans Amazon uses is 150 miles. if you go from a yard to a job and back that could work, but you either need to limit your distance to about 40 miles away, not much in a city, or plan to stop and charge at the end of the day. for a vehicle going from A to B to C you have to carefully plan your distances around charging.
I expect that the companies who successfully implement electric vehicles can control the distance with software defined routes, can afford to setup multiple bases around a city (like having a small warehouse 40 miles away you can restock and charge at), or takes the time to setup fast charging partnerships with other businesses so they can use them on the go.
and your cost goes way up with electric to daytime fast charge since that's when the local electric company will want the most money
you also have to account for temperature range loss. you lose 10-30% of the range to winter and most fleet vehicles sit outside constantly. So imagine needing double the vehicles or to charge much more often 1/4 of the year. they also lose 2-5% in the heat.