I've tried to get into alternative/open tunings, if only in order to play a little slide, but I hate retuning, and also don't know many of the ins-and-outs of any other tuning besides standard, which I've been using for almost 45 years, and become pretty familiar with.

I've learned a few songs in Open-D (Vastapol), and occasionally retune to play them, but most of the time I can't be bothered.

I don't even like to retune the one string for Drop-D, even though it gives a nice bass note for playing in D. Not long ago, I began to capo the top five strings at the second fret to play D-shape chords but actually in the key of E. I like this arragnement much better than retuning the bass string down two half-steps, because you can use "normal" (standard) chord shapes when fretting that bottom string. Of course, you lose the ability to play the bottom string open as part of E-shape chords, but that's a fair trade-off for gaining that bass string for D-shapes ~ and you can play standard shapes in many more situations than when you tune down to Open D.

I have a Shubb capo and just put it on the neck upside-down and clamp it off-center, leaving the one string open. A more elegant solution is to cut a quarter-inch or so of rubber off a capo so as to be able to put in on the guitar neck in normal position while leaving the one bottom string open. I'll do that one of these days, whenever I see fit to buy a second capo.

I realize this is a minority opinion. I would guess that twice as many Mudcatters use alternate tunings than stick strictly to standard. In fact, there are many who use alternate tunings more than they do standard, some even to the complete exclusion of standard. Blues players use Vastapol (down to open D or up to open E) and Spanish (down to G or up to A) for slide playing, and Celic/Irish/"Celtoid" players really like that DADGAD.