Two reasons I didn't cover it:
1.) Bitwig is not very popular, at least here in the US. MPV's own article (from 2018) lists the following in terms of widely used DAWs, although, I'm not sure how this list has changed in the last 3 years. Studio One and Reaper have certainly gained a lot of popularity since 2018.
Ableton Live - 20.52%
Logic Pro - 19.20%
Pro Tools - 16.13%
Cubase - 10.43%
FL Studio - 6.40%
Studio One - 5.71%
Reason - 4.98%
Reaper - 4.96%
Other - 4.28%
Sonar - 3.01%
GarageBand - 2.22%
Bitwig Studio - 1.22%
Digital Perfomer - 0.94%
2. For Brevity, and just from a practical standpoint (me having no experience with Bitwig), I had to cut some DAWs from the list. I opted to not include Bitwig, DP, Sonar and FL Studio, despite having experience with the latter three. Reaper was almost left out as well, but I decided to cover it briefly since it has a standalone plugin version, that can be used in any VST/AU DAW.
Link to Article: https://www.macprovideo.com/article/news/top-12-most-popular-daws-you-voted-for