The product name used by Apple is “macOS”, replacing “OS X” and “Mac OS X” and “Mac OS” that were used for now-old versions. The Apple product name is what it is.
UI designs are akin to fashions, and fashions come and go. There are things I like about the X11 CDE and Motif and XUI UIs, for instance. VWS was fast. Apple ][ was text-heavy and blocky. My little experience with Lisa found it to be nice. The Macintosh era through OS/9 was nice too, though its memory management was problematic. OS X was a big improvement, there. Aqua was okay. Liquid Glass in macOS 26 was wonky. Liquid Glass in macOS 27 isn’t annoying. Liquid Glass has similarities to earliest Aqua, too. But the current UI will get changed. It always does.
And beyond aesthetics, users’ UI needs and expectations and familiarity have shifted over the decades too, and will continue to shift. As necessarily do the products.
For what you particularly think of or want as a “Macintosh”, you’ll have to decide.
Do send your feedback to Apple. Preferably more detailed feedback too, as “Macintosh” and “macOS” isn’t even remotely descriptive enough. https://www.apple.com/feedback/macos/
Your expectations and your decision process might lead to using macOS 27, using an older macOS or OS X or yet-older Mac OS version, or using one of the available Linux-based UIs, one of the BSDs, or some other fine choice. But that’s entirely your call, your decision, your requirements, your needs, and your budget.
Do log feedback.
