There was a day when folk would spend a lot of money to get the lightest seatpost they could. Now people are buying **** heavy ones.
I was curious a while ago but since then I remembered I am lanky and quite happy riding with my post up. I will stop and drop it before a long steep descent. Some mates I ride with have them, they are no faster than me, and they don’t have to wait for me to manually drop my post before a long lakeland descent, as they are usually dying on the floor from the climb.
As with everything its personal preference but I cant see anyone who has spent £150 plus on one admitting it was a waste of money.