Our first 13.0.0 alpha release of the Distribution. This is by far not considered stable.
Mainly focused on [#3254517] which will be updated to show what is already done and what is left.
Related to flexible group migration
[#3380714]
[#3420088]
[#3420020]
[#3420069]
[#3438139]
[#3420101]
[#3420100]
[#3420102]
[#3420103]
[#3420099]
[#3420098]
[#3420097]
[#3420096]
[#3420095]
[#3420094]
[#3420093]
[#3420092]
[#3420091]
[#3420090]
[#3421348]
Other improvements / removals
[#3419584]
[#3418896]
[#3418731]
[#3418675]
[#3418051]
[#3417867]
[#3414921]
[#3412311]
[#3415353]
[#3348399]
Module updates in 13.x
Update drupal/search_api_solr from ~4.2.12 to ~4.3.0
Update drupal/metatag from 1.26.0 to 2.0.0
Update drupal/override_node_options from 2.7.0 to 2.8.0
Update drupal/like_and_dislike from 1.0-beta3 to 2.0.0
Update drupal/advancedqueue from 1.0.0-rc7 to 1.0.0
Update drupal/address from 2.0.0 to 2.0.1