New versions of Microsoft Office have been released since the last changes were made to the Excel UDFs. The new extensions (e.g. xlsx) are not (fully) supported and new functions are missing, performance for some functions needs to be enhanced etc. Some necessary modifications might lead to script breaking changes. To estimate the impact this will have on the community I would like you to answer the questions of this poll or add a comment to this thread. Please answer the first question of the