Free Boingo for Amex Platinum but the annual card fee is £450
Well, yes, but if you look at it correctly, the Boingo is just an additional perk on top of what you really get out of Amex (e.g decent family travel insurance with the same spec as Amex alone will probably end up costing you more than £450 p.a.).
But if you don't travel much then obviously Amex isn't for you since most of the benefits are orientated towards the regular traveller.