Kashrus in hotels has gotten better recently due to the velt becoming frummer, more knowledgeable, and more demanding in their kashrus. That doesn’t change the metzius of whether or not hotels are a good idea. The rabbis who go to hotels usually are there for free as part of the attraction (we have these singers, we have these rabbis, glatt kosher food, swimming and a daf yomi shiur). I spoke to someone whose zeidy used to run one of these hotels, and I was told that they used to be for singles, or older couples with no strength to make their own. Now it has become the “in” thing.
For those who don’t go- if you won a free trip to a Pesach hotel as a Chinese auction prize, would you go, or would you reject it as not being bederech yisroel sabah? Honestly speaking, I realized that I would be sorely tempted to throw my principles out the window if I won. Of course, I still go to the in-laws, so I still get to lock up and leave, just without 24 hour tea room.