Hi, Since SkyWalking OAP is fully moving on 9.x iteration, all 8.x releases would be removed as recommended versions on the website in 2022, like the tradition we did for all previous major version upgrading. Before that, I am going to remove 8.7.0 and previous releases from the download page as well as not hosting these versions' docs anymore. v8.7.0 was the last version separating ES7 and ES8 supports, which always brought a lot of confusion from end users. Also, considering it was released on Aug. 2021, which is nearly one year ago, Another good point to do this is, 8.8.0 is the first version Java agent that got separated from the main repository. So, after removing, we could remove `Include doc of Java agent(<= 8.7.0)` from the main repo's doc page.
Of course, no version and doc would be removed permanently, they are all in GitHub's tagged versions, as well as in ASF's archive SVN, https://archive.apache.org/dist/skywalking/. Sheng Wu 吴晟 Twitter, wusheng1108
