This is the respective issue as https://www.drupal.org/project/drupal/issues/80855 for D8, which introduced a new '#type' => 'table'
form element in the core Form API (change record: https://www.drupal.org/node/1876710). It comes with built-in, optional support for TableDrag and TableSelect, and it requires no more custom plumbing for most use-cases.
Building and rendering a table required to write a custom/dedicated theme function for most tables in Drupal 7. TableSelect (bulk operations) and TableDrag (drag & drop) support had to be added and attached manually when necessary. This led to many duplicate/unnecessary theme functions, which in turn made it hard for other modules to enhance or alter a table.
This was suggested to be backported to D7, but was rejected, with the recommendation to implement it in contrib (in https://drupal.org/project/elements specifically). Someone backported the D8 version to a dedicated contrib in https://www.drupal.org/project/table_element (only 300 lines of code in a single .module file; including comments: https://git.drupalcode.org/project/table_element/-/blob/7.x-1.x/table_el...).
PS: if we decide to do this, then this d.org issue is also related, and we should create a separate meta-issue for it, to convert all tables in core to the new '#type' => 'table'
: https://www.drupal.org/project/drupal/issues/1876712
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