At the moment, LTSB is a direct replacement for W7 for old hardware. But unfortunately, it does not have a classic theme with compact window buttons (without a dll system patch), so professionally packaged UI interfaces of various professional software simply will not fit on the screen with the same resolution as in W7 with the classic theme.
And the main problem (due to the fault of the scoundrels in M$) of the classic W7 theme is the lack of V-Sync support in browsers and when displaying outside the Overlay surface in players. Which is extremely painful for users.
So there is only one way out today - install LSTB and patch system dlls for the classic theme with compact window control buttons.
Alas, all versions of Windows, starting from 8+, can be considered amateurish, made for housewives, not professionals, precisely for this reason - the inability to fix the Windows shell the way they need.
Or switch to an even more buggy and unfinished Linux.