If you're noticing that you're not seeing as many threads in the forums currently, it looks like the default was changed to something more recent than it had been previously.
to avoid questions, if this is bothering you, you can resolve it quite simply.
Go to settings up at the top right of the page
On the Left of the next page, underneath 'My Account' Click on 'General Settings'
Scroll down to the setting for 'Default Thread Age Cut Off'
Change it however you like, and save your changes with the applicable button at the bottom of the page.
to avoid questions, if this is bothering you, you can resolve it quite simply.
Go to settings up at the top right of the page
On the Left of the next page, underneath 'My Account' Click on 'General Settings'
Scroll down to the setting for 'Default Thread Age Cut Off'
Change it however you like, and save your changes with the applicable button at the bottom of the page.