I'm sure that poster meant other cruise lines and/or the industry in general. The first cruise I was ever on was on the Wonder back in 2000. I remembered prior to going on that cruise, hearing from all my friends and family members who had already been on cruises always talked about the wonderful midnight buffets - the ice sculptures, the dessert offerings, etc. It was apparently standard practice in the industry. So we were disappointed when there wasn't one on the Wonder. But, I also understand why they never did it.
A number of years later, while on a cruise on RCCL's Freedom of the Seas, we were talking with our server one night and and midnight buffets came up. He was telling us that they had pretty much phased them out completely (and that most of the rest of the industry had also). He said they first switched from doing them every night to a couple of nights only on a 7-night cruise, then they went down to once per cruise, and then eventiually eliminated them altogether. However, one thing I liked about RCCL, is that they have the Promenade Cafe - which is open 24 hours - so you can always get something. Plus, the pizzeria (also in the Royal Promendae) which also always had some dessert items, was open until 3am nightly I believe. So you still had some late night options - besides room service (I'm sure one of you Disney apologists was going to bring up room servive eventually) - available to you if you're still out an about walking around the ship late at night.