I disagree. When watching How I Met Your Mother, I am always astounded that it was filmed in 2005. Practically nothing has changed in daily lives since then.
Well, I for one think it's very easy to tell that it was filmed in 2005. Men are wearing "baggy" pants by todays standards, are close shaven and no one is wearing athleisure.
'Athleisure', or at least wearing a tracksuit or tracksuit mixed with jeans as a daily driver has been popular since the early 90s. It was popularised by the British rave scene in the late 80! The primary difference now is its pastel coloured.
Half of those episodes would not be able to be made on todays political climate.
The skinny suits that NPH wears would look very dated today.