We restored an old farmhouse 20 years ago & we've repainted several times in those years. Mostly repainting the same colours as we have 99% Farrow & Ball paint.
We have changed colours in a couple of rooms.
We have the same core furniture since then too, sofas, table chairs etc though we've added more as we've progressed
We buy good stuff & have lots of antiques mixed with contemporary pieces
Dc's room has had several changes as they've grown from newborn to adult here
We're currently repainting our stairs & redecorating the utility room which has never really been done properly
Our bedroom is next on the list
Ultimately we need new windows though so saving for them now
Dh has a relative who redecorated her house annually & always in the latest trends & colours. She changes furniture & curtains & rugs & cushions etc its exhausting & also dates really quickly as it's so trendy. Her house looks like a next catalogue as she buys the ornaments etc to colour match. I'd say nothing in her house is older than 3 years
It's my idea of a nightmare!