I just think the SO has become meaningless, which is a shame. IT used to mean something. When Lansbury got a SO for Gypsy or Christpher Plummer for Cyrano, that was saying something, because audiences almost never stood. Hell, Mary Martin and Robert Preston did not get one on the opening night of I Do! I Do!
Nowadays, audiences start standing for minor characters in mediocre productions. By the time the lead comes out, the audience has already been on its feet for awhile...where's the recognition there.
When you left a show that got a truly deserved SO, there was an additional exhilaration that you had at knowing you just shared a truly special experience. I really do remember which shows that I saw got SOs from the mid-60s to the 10s, because they were rare. Right this minute, I can't remember the last show that didn't get one. I find that I do not applaud as loud as I used to because of all the hooting going on in the audience...why bother.
I really do think this started with American Idol, in which the audience members started standing after individual numbers to show that they were behind the particular singer. Eventually (I haven't watched it since the Adam Lambert season), the audience stood after basically every number. If they did not, they were saying that the performance was downright bad. They started standing on AI and soon after on Broadway and, based on Sarasota and summer theatres I attend, most every place else. So, it is not meaningless.