https://doc.qt.io/qt-6/timers.html

You cat start an event loop with QApplication::exec().

s/cat/can/

and why do we link right to QApplication::exec() when that's only for widget applications, and don't say so? (Well, it's mainly widget applications that need it... but further down there's also a link to QCoreApplication::exec())

The accuracy of the timers depends on the underlying operating system. Windows 2000 has 15ms accuracy; other systems that we have tested can handle 1ms intervals.

Let's make sure that's up-to-date. Nobody still uses Windows 2000 do they? (If so, they are even less likely to be able to use Qt 6 on it.) Do we know for sure that modern Windows handles 1ms intervals? What about all the other OSes? we support so many now...