Pardon me saying, but you are clearly not very bright, if you can not understand a direct response/answers to your own comments. But I am a nice guy, so I will chew it up for you further and feed it to you...
Deeper pockets: Meaning, as you are implying, that we are wealthier than one self.
Weight saving: Meaning, you do not need to buy, completely unnecessary bolton crap for your bike.
Touratech lockable mount is made of stainless steel, weigh of it got to be well over a kilogram, or over two lb in old fashioned denomination. More weight up top above handlebars, meaning, crap handling. But am not an expert, so do not quote me.
Did I mention anything about bike being stolen? regardless whether I have or haven't, your bike is a target, with or without satnav mounted (at all) in the lockable cradle or not. More so here in the UK than it be on the continent.
In Conclusion: Stop fooling yourself and justifying the need for buying more shite, as a result of browsing Touratech catalogue, whilst taking a

in the morning. There are better things to spend you money on.
PS: From personal experience, I used a clip on shade a few years back. It has had more use, sat in the top box... just saying.
Yours Truly...