Yes. At post 500 threads reach the bump limit, and are getting "autosaged". Optimally a thread should be 500 posts long. 1000 is the topmost limit, but 500 is the bump one.
Any thread that get replied will be moved to the top, and the thread used above bump limit will be moved back, and can't be bumped up (hence the term bump limit).
BO could pin the thread if he wishes.
There is an indicator in the html code of the page that a thread is autosaging. It is a span with the class "bumpLockIndicator" and title "Bumplocked". With a custom css some text, perhaps in red can be added which says "autosaging" or "bumplocked" or something the like. Again job of BO to add, users can help write the appropriate CSS rules.

>>19308
So its a feature not a bug - thanks for the info. BBG threads have been 1000 posts since 2019 so I'm guessing they will stay that way and just deal with being a bit out of order.

>>19309
yea big post threads just make computers really really slow. And we want the site to be some what friendly to older computers.