This claim is ultimately true, even though the sources didn't establish his claim with as much evidence, as he did with emotion. The source, Michael Aloysius, is a mid-elderly aged man who shares a post on Facebook stating that the term "master bedroom" is non-existent and there is simply just bedroom stated on there. And these houses he implied as being viewed are usually seen from people of "middle class", and people that can't afford a higher priced as anymore because house prices are starting to sky rocket in today's day in age. Especially, housing in the west coast, which Aloysius is from the pacific west coast and works in software. As he is probably posting this information through his own frustration and bias, as I can notice he is one to talk back and cause havoc in the comments to many people who respond to him, he is correct. If you took a look on Redfin or Zillow, it does display that there are just a certain amount of bedrooms, and not a showing of any master bedrooms, changed around in mid -2020.
As one views this claim and Micheal Aloysius states, many would view this claim is due to the rise of housing, and that high prices creates houses that are creating similar sized bedrooms now are all considered "just one bedroom", and the homeowner can choose which one they want as the master bedroom. But a source explaining the review of Willow.com explained that this shift was due to "the reference of master has presents a negative connotation linked to the times of slavery or gender hierarchy", which can be harmful do different sexes, races and ethnic identities. They argues that it "is important for every homeowner to change how they refer to places ion the house", to create a more inclusive environment. The neutral language will encourage many more to shop in there sites and invite users to come bak, due to the good experience. Another source that describes that Zillow and resin have been starting to loose significant money due to the lack of sensitivity explored in the early 2000s, the new language is "now enforced and encouraged to continue" to create experience for users in the long run. These websites goal is to grow with the times and society, and not to judge anyway, especially the wealth of the middle class in today's economy.