Personally I think the trend is for smaller frames. I'm not a fan of that either. Whether it's better or not, I prefer larger frames. I spent over 35 years on a 26" Varsity. I currently ride a 59 cm Raleigh and 60 cm Schwinn Paramount. At 5'11" I'm told I'm on too big a frame. However I doubt I could ever feel comfortable on smaller.
If performance was all that matter, then maybe I'd try smaller and see what the stats showed.
But before I stray too far.............. for new bikes it's rare that I see a road frame bigger than 58 cm. I'd think other styles similarly are seeing fewer really big frames.