I clean out reguarly. I only have one unused never worn garment still with tags on.

Some I have not worn for a while. I clean our pretty much every season, I don't necessarily replace, just clean out.
I have a few items that would be classed as vintage now Those I keep!
My wedding dress I have only worn once, will keep it for DD. I know of couples that regularly get back into their wedding gear for a night in.