I went back to carts last year after about 12 yrs of DE only. I saw a Mach 3 on sale for couple of quid and I said to my self: "mmm I'm going to try for the sake of it just to see if anything has changed". The results: an amazing effortless shave. As far as I am concerned, I believe the DE experience has served me to develop a proper technique, i.e. no pushing, dragging etc. I then switched to the fusion as my main razor. Every now and then I get one of my DE, but I can get that close effortless shave I can get with my fusion which has now become my main razor I use 90% of the time. I found that stropping it on my non hairy part of my forearm keeps the blades clean and make them last longer. This way I also solved the issue of the cost of replacing carts.