I use Version: 5.2.7.2 (x64) because it is last version without kerning bug on Windows. How good is GUI 4K scaling in LibreOffice Writer Version: 5.2.7.2 (x64)?
I suppose, about 42.
well - that was my poor attempt to show you how strange a question like “how good is Foo” looks… Which answer do you expect for that “how good” question? ;-D I’d say, try to re-phrase the question, to make clear what interests you (like “Can it do this and that”).