It works well but takes up more space because you can't stack washer/dryer, in Europe apartments and houses are a bit smaller so if you can save a square meter then that's good.
Stacked combo units with a top-load washer on the bottom definitely exist[1].
Whirlpool makes them by combining washer assemblies from Clyde, Ohio and dryer assemblers from Marion, Ohio.
(It's not necessarily the most convenient way to do things, but it is also not a fiction.)
[1]: https://www.whirlpool.com/laundry/laundry-sets/stacked-laund... [scroll down]
Stacked combo units with a top-load washer on the bottom definitely exist[1].
Whirlpool makes them by combining washer assemblies from Clyde, Ohio and dryer assemblers from Marion, Ohio.
(It's not necessarily the most convenient way to do things, but it is also not a fiction.)
[1]: https://www.whirlpool.com/laundry/laundry-sets/stacked-laund... [scroll down]