I enjoy anal-retentive things (none more so than Phil Hartman's brilliant SNL chef character who accomplished nothing) and lately have weighed soaps/creams to see how much % of the full vessel is used with each session, and thus its cost per session. Milled soaps typically cost the least to run, especially when they're not fancy names, and as a genre the "any-American-without-EU-testing" group of 'croaps' are the most costly way to make lather. But to make the point most clearly on just how $$$ it is to have all the latest new kids in town, here is comparison of the most costly soap I've ever bought (Creed's Vetiver soap+bowl for which I paid $96.30 in 2014 and which goes for $125 today) with a tub of supposedly superior 'artisan' soap from US (in this case Wholly Kaw King of Oud Tallow, can be had for $24 if put in an order but for which I paid $27.94). Even comparing the Wholly Kaw using the least-costly $24 option to the Creed with the most-costly $125 option, guess which one costs more to use per session? The Wholly Kaw does, and it isn't even that close!