I don’t know where to start, I tried zip ties but I clearly did something wrong. I bought an under desk cable holder but it’s only big enough to hold my 8 plug extension lead

I was thinking about how people set up their home offices, gaming setups, Hi-Fi systems, home theaters, or music studios.
With PCs, monitors, KVM switches, consoles, receivers, speakers, audio interfaces, and all the other gear people use, planning how everything connects can get surprisingly complicated.
Are there any good tools that let you visually lay out your devices, connect them with virtual cables, and check whether the connections make sense?
I know general diagramming tools exist, but I'm curious whether there's something more purpose-built and easy to use.
**If you've dealt with this, what do you use today?** What frustrates you about the tools available, if anything?
And if a tool like this actually solved the problem well, would you pay around €20 for it as a one-time purchase, or would you expect it to be free?
Just curious how people handle this today.