First of all, shocked people still use d3. Hasn't there been something better? It's pretty ancient by javascript standards. Do people still use jquery too? Haha... been about a decade since I touched this stuff!

Second of all, isn't it ungodly slow? I get that it can draw a few boxes nicely, and maybe shuffle them around, but I had to write my own engine using html canvas because d3 couldn't get svg to flow properly if I had thousands of pixels in my image.

Honestly, if you're going to go through the trouble of understanding d3, I would just write your own javascript canvas to animate things.

Vue is about as ancient yet people still use that. Python is even older.

Bingo!