Good Question! We should all avoid wearing a suit day in day out. Yes there is an obvious reason ... but also a less obvious reason too! Fabrics need to rest!!!! Yes - thats right, even modern fabric need to rest.
Traditionally it's recommended that a suit should rest for 3 weeks after its been worn - that is a luxury most of us can't afford, but certainly a different suit each day of the week is a step in the right direction.
This enables our clothes to relax and the fabrics to be more durable and last longer!