I load my little wheelie-cart, my laptop for some work or a book if I have time, and do what I'd normally do somewhere else for a couple hours. The only real differences are minimal interactions with humans, a need for quarters, and having to wear pants.
Folding is tedious. I hang everything except T-shirts, and some way to skip folding things simply to hang them at home would be nice, but that would involve a vehicle, which is its own bundle of urban hassle and silly for two blocks.
I'm not sure of the tradeoffs. If you have the space, doing laundry while you're in the house for other reasons and transferring manually is the least of the effort.
For the single drum units, you lose the ability to wash 1 load while another is drying. The perk is that you can throw a load in when you leave for work and it will be done when you get back home. If you have more than one those, you're extending your total wash time from
wash * loads + (1 dry time)
to
(wash + dry time) * loads
i am considering replacing my (unused, broken) dishwasher with a small combo washer dryer and continue doing dishes and cleaning by hand. i think that would be the optimal setup in terms of time and effort and money spent.
Multiple loads means a multi hour time commitment to being on stand by to transfer and continue the process.
The programmer in me actually has resorted to throwing everything in the car and driving to a laundry mat if I have a build up for some life reason. Then I can wash and dry 12 loads concurrently and be done with it all in about 2 hours. Laundry mats are "the cloud" of home chores.
Now if somebody ever manages to automate the process of transitioning from washer, to drier, to sorted and folded in the home then they will rightly make a fortune as the time savings would be off the charts.