I tend to think most first time builders of an electric skateboard are naturally attracted to the option of LIPO, it is cheap, readily available and fairly straight forward, especially if you are not planning on joining packs in serial or parallel configurations to increase voltage or capacity. My first few DIY eSk8’s where running 6S 8000mah lipos from hobby king and I was more then happy.
However there are some things with LIPO that are not so great, mostly to do with charging safety keeping cells balanced and charging simplicity. Not major issues & certainly not impossible to manage with some planning, but i think as the DIY scene evolves more eboard builders will start looking at other options for their batteries and probably follow the lead of the DIY e-bike scene who are more commonly using the 18650 type cells.
Here is a really good article I just read about the advancements with 18650 form factor cells.
For me personally I’ll probably never use LIPO again, I’m too lazy and just love plugging in my “one-plug” charger into the on-board BMS built into my battery and going to bed!