So far I have found two possible reasons for cable lifters:
1] they might tidy up room appearance and make vacuuming easier.
2] they might prevent cable color agents from staining a light colored carpet.
+1 on the Shunyata lifters, I have the previous version and they do the job nicely. I also borrowed the furutech lifter a while back but that coincided with the start of my house renovation and then house sale so I didn’t get the chance to use it at the time so can’t say as to the performance differences. Impressive bit of kit though.
However, i wouldn’t imagine using the Furutech lifters for more than use at power cable ends and in reality am happy with using Shunyata lifters and then Entreq wraps around the connectors. This combination has a nice functional look overall, not too OTT in cost and a good balance of both dealing with shielding and mechanical support for power and signal cables and connections.
I use lifters for two reasons. First to keep dust bunnies at bay and second to make sure there is less stress on receptacles. Sonically whatever improvements there might be are in the "I could just be imagining it" category. I can't really say. I don't have wall to wall carpet so there are no benefits to be had on that front.
I think as Elliot mentioned, Furutech has now has two sets of elevators, those intended for power cables and those intended for cable elevators.
As to the support for the power cable, my MSB Select II is almost unusable with the large Gobel fitting without the Furutech as the leverage without it causes it to unplug too often. I think these high end manufacturers of all brands would do well to build their products with better support for cables of all types knowing that all (or almost all) endusers will be using these type of high end power cords and cables.