It's been really hard for brides -- or anybody else -- to find anything but strapless in the last ten years or so. This is a real problem because our Buddhist Temple, like many Jewish Temples and Christian churches, does not allow strapless or even sleeveless attire on anybody (men or women) ever. I also do not want to wear strapless or sleeveless anywhere, anyway, as I don't think they flatter older women. I couldn't find an evening dress that wasn't sleeveless, and almost all were strapless, anywhere but "modest" clothing websites when I looked recently, and they only had day dresses or bridal gowns, in truth. I found no useful shawls -- which I dislike -- and no suitable jackets, either. Not a lot of choices out there, IME. I ended up in a floor length, long-sleeved ao dai, which is lovely and had the benefit of being relatively cheap, though I was trying to avoid "ethnic." The Indian trousers and tunic (forgetting the name) outfits came in second of available and appropriate choices.
The best dress idea I have seen, though I wasn't nuts about the dress itself, was on American Gypsy Weddings. It started out with a ginormous skirt, huge train, and a modest, church appropriate (Catholic, I think) neckline and long sleeves in lace. The lace top came off after the ceremony to reveal a strapless ball gown. And then -- the whole huge skirt and train deal came off, leaving the bride in what seems to be a standard cocktail dress design -- strapless with a mini-skirt. Brilliant!
If your ceremony venue allows it and you want to wear strapless, go for it. But I don't think what is really a ball gown is a good choice for a wedding dress, either. I just want more choices available for us all. And yes, there are still balls, and still debutantes. A "Quince" is a kind if debutante party, for example, and so is a "sweet 16." They introduce the girl to adult society at her first "grown up" party, and announce that she is now considered, for social purposes, an adult.