Whil historically, a version of LDD has been used in-house, I would think that many new designers will have cut their teeth on Studio, prior to joining the company

Indeed while the LDD page will be closed from 31st January, the news that it is no longer supported is now apparent: On the other hand, LEGO Digital designer has been getting fewer and fewer updates with new elements over recent years. Studio has been on the rise over the last few years, particularly with the rise of interest in LEGO building during the pandemic, its integration with BrickLink and the Bricklink Designers Program. It feels a bit like The LEGO Group is tidying up the house in preparation for its 90th Birthday later this year: Last night we heard about the merging of Bricks and Pieces into Pick a Brick, and this was followed hours with news that LEGO® Digital Designer – a stalwart of many fans of digital building – is going to have support discontinued, to be replaced by ongoing development of LEGO BrickLink Studio, as the group’s officially supported digital building application.

Lego brick builder software