I'll endeavor to list most updates, minor to major, within this thread. I'd encourage people to check them out and provide feedback.

March 25, 2019:

- Letter-based default avatars (generated automatically)
- On the front page, avatars turns into a link to the last post (instead of a profile link) when page width is under 490 pixels.
- Within threads, circular avatars when the page is under 500 pixels

March 27, 2019:

- Necropost warning is no longer displayed within "Open Discussions" or the support/update sections (displayed everywhere except "Site Suggestions", "Site Support", "Open Discussions" and "Requests")
- The quick reply box disappears after 30 days (except "Site Suggestions", "Site Support", "Open Discussions" and "Requests") -- this will discourage necroposting. It's still possible to go to the reply page where the necropost warning will appear.

March 31, 2019

- 25 threads are listed per page instead of 20 (this might increase to 30)
- Additional minor design changes and mobile-responsive elements
- Floating "New Thread" button to improve mobile usability
- Rounded square avatars instead of circular (in contrast to most sites)

April 1, 2019

- More mobile-responsive pages
- Additional design changes