Reminder that there are currently no workarounds to following a reblog chain back.
"Prev tags" is not going to work. It was always inconvenient and controversial, but it is now impossible.
If someone brings up the "click the empty space next to it" thing, they are mistaken. Here's an example:
If I click "sergeant-angels-trashcan" I will go to the top of that blog. If I click the white space below the username, I will go to this post on that blog.
If I click fucklestat, I will go to the top of that blog. If I click the white space next to that username, I will go to this post, at that specific comment, on that blog. This is how we avoid additional comments we don't want, like when you have three people in a row that were just tagging another person or going 'omg this' and you want to cut back on
(That doesn't apply to this specific post, where the dedalvs addition is actually super cool, but the fact that I have multiple reblogs in a single post was important for the example.)
However, if sergeant-angels-trashcan were to tag this as "prev tags," with no additional information, then the reading is "sarge appreciates the tags from rainbowwificonnection. I need to find this post on that person's blog.
Previously, I would click on their name up here, and it would take me to that exact post on their blog:
It does not do that anymore.
Like the other 'click on the username' situations, it takes me to the top of this person's blog. However, clicking the white space above, below, or next to them will take me to Sarge's post, not rainbowwificonnection's.
Can I open up the notes and dig through the tags? Sure, maybe. If it's a post that's gone viral, though, and it's a few days out of date, it will be next to impossible to find the specific post and specific tags. Could I go to their post and scroll down until I find the post? Sure, if this isn't a queued post, and the post is from the last day or two instead of a few weeks. Remember, searches don't work consistently on this site.
And beyond that, if the previous person has reblogged a post multiple times, you can't be sure you've found the correct one.
"Prev tags" only has meaning to the person you reblogged from, unless you copy the tags out and include them in the body of the post or into your tags with "<< prev tags" as an indicator.
So yeah. Stop using prev tags. They've gone from inconvenient to downright impossible.