This implies to me that you never do anything besides walk from your air-conditioned home, to your air-conditioned transportation, to your air-conditioned destination.

Hobbies sometimes benefit from different clothing - playing sports, hiking activities, water activities, layers for UV protection or heat insulation, 'work' clothes for getting dirty in a garden or painting a house, etc.

I could admittedly get rid of a lot of clothing that I rarely if ever use or could readily substitute something else for. But I still probably have a dozen different pieces of footwear I need for different purposes and a closet worth of clothing that I genuinely use on a regular basis for work, around the house, and hiking/watersports/skiing/other activities across multiple seasons from sub-zero to nineties F temperatures.

I live in the North of England, Air Conditioning isn't a thing here and I don't drive or use public transport (I live a 15 minute walk away from work).

I do have some cycling gear but that's specifically cycling gear.

> I live in the North of England, Air Conditioning isn't a thing here and I don't drive or use public transport (I live a 15 minute walk away from work).

Ok, it sounds like I was pretty close.

You sometimes cycle but otherwise don't have any hobbies which would benefit from specific clothing and your climate seems moderate enough that you can get by with 3 shirts. I admire the simplicity!

I discovered that moving country is a great way to figure out what clothing you actually wear.

All my clothing now fits into a single army surplus duffle bag.

Apparently you live in a stable climate (or are immune to weather changes somehow).