I guess it's because everything happens indoors now. We have very active teenagers who would normally be at school and then at football training or football matches, and they are ricocheting around the house instead. DH would normally be away at least a couple of nights a fortnight or working at the office but he's always here too. I would roughly reckon that we've had around 5 normal years of wear and tear in just one year of mostly lockdown. Everything is looking a bit tired, stained or damaged.