As they should. There are fundamental differences in hardware and capability between 1992 and 2026.
The most immediate are pull-down menus at the top of the screen. They work good on a 9 inch screen, they are awful with 27 inch displays.
Another related change are modal dialog boxes. When you have a 9 inch screen you're fundamentally looking at one document in one app at a time. When you got 2 27's that's not true anymore.
You don't have it "now" unless you didn't upgrade to 26.3.
But yes. The only way you can resize windows through System 7 is the resize widget. You cannot grab anywhere else and drag. They couldn't afford the extra chrome pixels, again, on a 512 x 342 screen.
It's still a "known issue" in 26.3
(Though I haven't upgraded to Tahoe at all yet so maybe the release notes are wrong? But everything I've read indicates apple said they fixed it then changed to say they didn't.)
https://developer.apple.com/documentation/macos-release-note...
There was a study which menus work better, on a screen edge or context menus that appear right under a mouse pointer. One might think that the second kind would win, because they are so close. No, the first kind was faster. Apparently the stability and the fixed location also play a role. People basically just use them almost without looking, while context menus always require a conscious choice.
The most immediate are pull-down menus at the top of the screen. They work good on a 9 inch screen, they are awful with 27 inch displays.
Another related change are modal dialog boxes. When you have a 9 inch screen you're fundamentally looking at one document in one app at a time. When you got 2 27's that's not true anymore.