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In 20 years each LED will be a pod in a Kubernetes cluster, running Node.JS and the output color will be controlled through React interacting with blockchain smart contracts.

And they will still flicker annoyingly.

Each LED will have its own NFT.

All of them on wifi… Imagine the utter hell of living in an apartment building surrounded by neighbours blasting every Hertz of the wifi-spectrum with hundreds of cheap devices.

This is now, haha. I can see over 200 APs from my bed (1/2ish are xfinity wifi).

Fortunately my place is so small a 100’ cat-5 cable reaches any point in it, so I just use wired. Wifi barely works.

Considering wifi-6, but I can’t figure out if it helps with this type of congestion or not…

I dunno... I2C bus was designed in 1982 and it is still in the wide use today, and no replacement is in sight (for the "low speed inter-board" use case).

The hardware world moves much slower than software one, and the if the designs work, they are rarely replaced.