Quote:
Originally Posted by stanking
Now that the Qt5 transition event is over with most plugins using the new version, is there any reason to continue using the try...Qt5...except...Qt4 code block? Is Qt4 needed for backward compatibility for new plugins, or just for those updating older plugins?
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The backwards comparability is needed because Calibre 2.x won't run on Windows XP and some old version of OS X. So those people will either have to upgrade their OS and/or computer or stick with Calibre 1.48. So yes, because there are people still running 1.48, backwards comparability is important.