Some information from WordPress.com:
5.0.2 is a maintenance release that addresses 73 bugs. The primary focus of this release was performance improvements in the block editor: the cumulated performance gains make it 330% faster for a post with 200 blocks.
Here are a few of the additional highlights:
- 45 total Block Editor improvements are included (14 performance enhancements & 31 bug fixes).
- 17 Block Editor related bugs have been fixed across all of the bundled themes.
- Some internationalization (i18n) issues related to script loading have also been fixed.
Read all about this release here: https://wordpress.org/news/2018/12/wordpress-5-0-2-maintenance-release/
I am expecting this frequency of updates to continue for a while with WordPress 5.0…it is so new that improvements and bug fixes will be a thing for a while.