I have wooden floorboards and love them. I think it's only really a problem if you (and your neighhbours) wear your shoes in the house. My best advice would be to keep them but make sure you've got plenty of soft furnishings (cushions, rugs, etc) to absorb the sound. For example, a friend of mine asked her neighbours to put down some rugs in their living room, and it really made a difference to how much she could hear, especially the TV.
If they're original boards then there's not loads else you can do other than carpet them but if it's laminate you could take it up and put in insulation which would help with the sound.
The only other thing to bear in mind is that if you're leasehold then your lease almost undoubtedly says you can't have floorboards because of the noise issue. This is only really a problem if your neighbours complain (or you complain about them).
I'm sure Andy and Lucy will have some sage words to add to this...
Buy the freehold. That shuts everyone up.
Only listen to the shallow side. Life's easier that way.
Carpet on the stairs is only civil. In the living room, we laid two layers of underlay and then put wooden floor on top. This was more about levelling the floor rather than sound insulation, but it damps the sound pretty well.
Moving the boards (taking them all up and squeezing them together) closes all the gaps up and damps the noise. It's not that hard.
Otherwise buy the freehold and evict them.
Solidarity with the people is all very well, but it's far easier to become an oppressor/rentier of the people.
Also, standing firm with the proletariat doesn't lend itself to laughing like an evil genius, which I enjoy as well.
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