Memberships are not all the same. Some memberships last a lifetime, others last a year, or a month. Some memberships are for an individual, others for a couple, others for an entire family.
Lots of stuff has been changing in Drupal 8 recently. In 8.3.0, a new experimental "layout discovery" module was added to core, which conflicted with the contrib "layout plugin" module.
As I write, we're in the midst of a big Ransomware attack. Millions of computers have been infected, with their data encrypted, held ransom pending an extortion payment or deleted. Supposedly.
Extreme irony: the person most responsible for making Drupal a mature, stable, long-term platform has been ejected from a leadership role for reasons that are not entirely clear.
When thinking about ways to measure your website’s effectiveness, you may also want to think about the metrics you use to gauge the success of the website in accomplishing your business goals. How else do you measure success?