I heard on a podcast that the VS code guys were anti tabs as it usually quickly ends up in that pile of tab clutter with tab labels like "Be.."
I've also got used to this new method and think it is generally better.
Glad to see they are listening to their users though! :)
I hope tabs supports splits - sometimes I have a three way split where each file I'm working on is in the 'right' place. Then I need to look at a few files for reference and I usually wreck my layout. Tabs could be a good solution for this.