A few of my 2019 memories:

the year I used Gutenberg for all projects (bye-bye Classic editor)
the year I used wpforms a lot
the year I learned the Restrict Content Pro (RCP) membership plugin
the year I experimented with Rank Math
the year I transitioned to the Newspack theme for my archive
the year I stopped watching toxic, biased media and news outlets and focused on positive, fun pursuits
the year I cut the cable cord and watched a lot of YouTube instead of TV
the year I visited Alberta and British Columbia, Canada (including Utah, Wyoming, Montana, & Yellowstone - wow!)

All in all, 2019 was a great and exciting year for new technology and WordPress.

Happy New Year and Happy New Decade for one and all!