That is one of the largest misconceptions people have when discussing Xray...
They believe that the release of a new model makes their existing stock of spares useless, when the opposite is more often than not true.
Xray traditionally has evolved their platforms and has shared parts across several generations, especially regarding wearing parts.
Xray is one of the few companies (frankly, the only one that I am aware of) that openly posts a parts compatibility spreadsheet showing which parts have compatibility across which models and generations