The first high quality reference genome assembly of wheat that also resolved most of the transposon derived repetitive space was obtained from the cultivar "Chinese Spring" and released in 2017 (www.wheatgenome.org). Since then a further nine elite wheat cultivars from different countries have been assembled and annotated to the same high level of reference quality under the auspices of the 10+Wheat Genomes Project (www.10wheatgenomes.com). The now finished consistent annotations of genes as well as transposons for 10 wheat cultivars with highly contiguous chromosome assemblies offer a unique data resource for comparative pan-genome studies. Differential transposon insertion and removal are thought to be one of the major causes for sequence variation between closely related lines. Following a nutshell introduction of transposons in wheat and their usefulness to assess assembly quality, the insights gained from the 10+wheat data on the short term dynamics of LTR-retrotransposons will be presented and their potential to cause phenotype variation discussed.