The discussion is about adding an option to display reply numbers in topic flow. aaroleung initiated the conversation, suggesting that admins should be able to turn on display of reply numbers to make it easier to reference posts in topics with many replies. codinghorror pointed out that reply numbers are already visible in the address bar, permalink, and date marker. deltamotion expressed support for this feature, mentioning that some users on their forum have been requesting it. Falco shared a link to a related topic (show post numbers) which may provide a solution.
When there are many replies inside a topic, it will be hard to know which position of reply post for reference .
Now the reply number is shown when searching , but it doesn’t show up in the topic flow.
I think it should be better to allow admin to have an option to turn on showing each reply numbers beneath the bottom or the sides in each reply.
Also shows up in the address bar as you scroll.
And when you click or tap the share icon to get permalink.
And the date marker in the upper right is also a share / permalink, like Twitter.
yep, this will be great 
This is a much desired feature for our forum from some of our older users. An option to show a big bold reply number somewhere on the reply itself … (the existing linking, scrolling, etc is great! but not quite enough for some). Thanks!
Thanks! That looks like it will help.