3D MVC on build 9.2.8 behaves just like 9.2.6.
Display is okay but sometimes there are difficulties with misaligned .sup subtitles which looks like an old misbehaviour of some Kodi versions.
In the past I've used an RPI2B but I wanted something beefier so I got the RPI3B+ because the RPI4 doesn't do 3D MVC (yet).