You can achieve phenomenal results with "just" drybrushing. The trick is lots of thin layers, and subtle color shifts in application.
For example, instead of drybrushing a light grey directly onto a dark grey, you might slowly mix incremental amounts of light grey into dark grey to work your way up.
It's almost like airbrushing or blending, but somewhere in between for control and accuracy.
Look up Bohun. His technique is almost exclusively drybrush and freehand lines.
An example of his work. Of course, if you've seen his tutorial vid (patreon paywall) you'd also learn that it's not a quick technique. He spends as much time drybrushing as someone might do layering, or blending, or glazing/feathering, etc.
But the point is you can achieve phenomenal results if you put in the time/effort.