Has anyone retired DE for SE?

I have.  I switched my merkur 34c for an ATT SE1 and couldn't be happier.

I love using them all DE and SE (Gem,Injectors,AC blades) I enjoy using all kinds of blades and razors, shaving is more fun this way

I use my S/E pretty well all the time now.  Once in a while I'll pick up the Wolfman—and it works great—but I really like the closer shave I get with either of my S/E razors (Asylum and Mongoose).

I might add a Mongoose II to my collection this year.  I find the current one a little heavy.  It also takes the PINK blades, so I'll be all set in that department.

Every now and them I use a DE, mostly vintage such as my late Father's rocket or some pieces that are just great.
But the ATT SE1, Colonial General and Hawk are the ones that are I use most of the time.

Several years ago I abandoned both DEs and SEs and went back to Mach3 and Sensor. I haven’t looked back and haven’t had the urge to pull out my DEs and SEs; in fact, I’m thinking of selling them. After 50 years of shaving regularly I think I’ve found my sweet spot in razors.

I still use both DE and modern SE razors. But I believe the artist club SE blades are the sharpest blades around.

I never saw it coming.

A Weber PH has been my daily razor for many months.

Then I used a Gem. It was "ok." Then I bought an SE-1. It was way to heaving and bulky. Then I bought a Sabre. Didn't like the stock handle. Put on a Bulldog handle.

And I use it 5 or 6 times to the on of the Weber.

Never thought it would go this way.

I can't limit myself to one format because I very much enjoy using all formats - DE, SE, and multi-edged razors. I have a random rotation of a large # of razors. My favorites include Oneblade, Paradigm, Wolfman, Timeless, ATT SE1, and injector razors that uses twin blades. For travel it's the Gillette Guard. Variety is the spice of life.

I haven't but I certainly could. Between my Schick J2, L1, GEM Damaskeene, GEM MMCP, and Razorock Black Hawk (V2) I get some fantastic shaves!