I got back into making electronic music a while ago, and you can dig in deeper by getting into hardware synthesizers. And go deeper by getting into hardware modular synths. And go deeper by building modules from kits. And go deeper by learning electronics and designing your own modules.
It's like a big branching tech tree or tech graph.
With fishing, you can get into fly fishing. And when that's too easy, you start tying flies, or maybe tenkara, or, I guess in your case, making fly rods.
I love it.