Block Interactions and Data Packs

I think it would be very cool if it was possible to create custom block interaction mechanics using data packs. It is already possible to have water convert a lava source into obsidian, as well as a flowing lava into cobblestone. Other mechanics such as lava on top of water converting it to stone as well as lava in between blue ice and soul soil creating basalt would be very interesting if they could be customized in data packs. I believe that custom block interactions would be very interesting because it could mean you can customize how liquids and even solid blocks behave with other blocks around them in a custom data pack. It could also be used to run commands without converting any of the blocks affected, and also detect which player caused the block interactions(if the player placed each of the blocks). The possibilities are endless for data pack creators and can be very interesting to play around with.