@Sonichu
only on MN would only having one bathroom be considered "backwards" or that having the luxury to turn your nose up at places without multiple bathrooms be considered the norm rather than the exception.
I know right! Madness!
Most people I know live in a house or flat with one bathroom ONLY... even .... people with a family with 2 or 3 kids (or more!) (SHOCKER!) 
Some people have a downstairs loo, but some just have the one bathroom/one loo, and that's it. And ya know what? They manage to cope. Amazing really! 
There is nothing wrong with having one bathroom/loo per person in the house if that's what floats your boat, or if you feel you need that. But to look down your nose at people who have ONLY one bathroom (when there is more than 2 of them,) is actually laughable and pathetic, and is making you look remarkably silly and precious.
Most of the world would piss themselves laughing and such precious snowflakery. 'Oh you only have one bathroom when there's THREE of you?!'
'How DO you cope.' 😧 faints 😲
There's only me and DH now, and sometimes I'd like a spare loo as he spends so long in there, (some days,) but we had one bathroom/one loo for 20 years with a family of 4, and I can't ever recall there being an issue with it.
Also, I grew up in a family of 4 (me, my brother, and my folks,) and we had one loo/one bathroom only, and again, not one single issue ever..
This really is alien to me. (People acting shocked at people having just one bathroom!) As I said, 90% of everyone I know has one bathroom. About a third of them have an extra loo, but multiple bathrooms is not a thing with anyone I know. The odd few people have an en suite in addition to a bathroom (in new-ish houses,) but most people have just the one bathroom.