For a self-hosted vector tile stack you can have a look into https://github.com/onthegomap/planetiler I found it very easy to get started and when you know the other stacks it is also very fast to create these vector tiles even for planet-scale.
(note, that I'm not affiliated with them, but they use some source code from us for the efficient import and also contributed to GraphHopper, but this did not influence my experience ;) )
> I wonder why so many seem to be moving away from raster tiles to vector data.
The flexibility of styling. And you can easily serve customers that need different default languages. This makes maps also more accessible for countries without Latin alphabet. Also when you rotate the map (like for GPS navigation) the labels can rotate too if necessary.
(note, that I'm not affiliated with them, but they use some source code from us for the efficient import and also contributed to GraphHopper, but this did not influence my experience ;) )
> I wonder why so many seem to be moving away from raster tiles to vector data.
The flexibility of styling. And you can easily serve customers that need different default languages. This makes maps also more accessible for countries without Latin alphabet. Also when you rotate the map (like for GPS navigation) the labels can rotate too if necessary.