Where do we reach the point of overkill and just start wasting time?
Definitely worth thinking about.
All discussions can be reduced to something simple:
The cleaning fluid has the task to make any kind of dirt soft. When it is soft enough, it can be removed. Of course ultrasonics can help here, or a towel....
The real task (and secret - or background - of ANY Design) is the way to REMOVE it.
When you have a drink with a Straw and a given sucking power you know, the more narrow the Straw is, the higher is the speed through it. And you have also the most power in this diameter when it is narrow.
The bigger (wider) the Straw is, the more power you will loose. Motors from RCM's are not rated in HP :-)
Here we have the most powerful ability to get something out of the groove.
Another important fact is, what happens after the removal?
The area from a point nozzle design is after the sucking process completely dry.
Any other Designs have another kind of "lips, brushes, fans" behind the vacuum. When that one is wet (happens very fast, too much fluid or a few records in a row) then there will stay some wetness after the vacuuming. This fluid will dry after some time and when you play it again, you will have surface noise again. There is no way out. VPI units (or similar designs) are a good example for that.
The Audiodesk uses the same cleaning fluid again and again, there are filters, but forget them after a while. There are brushes, but forget them after a while .... It is a nice toy, great for Audiophiles who can live with something which saves time, is comfortable, in a way it is "modern High Tech" and that is ok.
I know record dealers who tried it and no one used them for a longer time. Most have Loricrafts or when they can afford it, a Keith Monks.
All Designs have some strengths, because they are all better than doing nothing, but when you think about what is responsible for what and how it is solved (and the reliability after longer time) it is obvious, that you will find different opinions.
This is ok and absolutely normal. When there are various opinions, every reader can try to find the right one for himself. The world is loaded with Jaguar Drivers, but when I can afford only one car because I buy it and have to use it for 10+ years, my choice is Mercedes.