Best practices for "bus wiring"?
There are indeed products that do this. Search for "solderless T tap connector".

The connector's metal contacts are designed to to cut into the insulator and grip the metal inside when crimping the connector onto the cable. I believe this is used in the automative industry though the last time I saw something like this was in industrial automation.

Before computer Ethernet LANs used RJ45 connectors and twisted pair cables they used BNC connectors and coaxial cables. There used to be BNC connectors that you can clip on to the cable that cut into the plastic and top the copper inside so you can quickly build an entire lab's network using a single long coax cable. But I can't find them on google anymore.

Another option, especially good for hobby projects, is to use a ribbon cable. Ribbon cable connectors are designed to bite directly into the cable without stripping or soldering. This has the side effect that you can tap into the ribbon cable at multiple places. Back in the day before SATA, IDE drives used this trick so you can install two hard disks onto a single ribbon cable. For serial communications, a 10-strand cable is just right.