Thanks for checking out the site and for the insight Justin H.! You're absolutely right, the heavy lift on the footer and the load time are the downsides of using Gamma for a full site like this.
Good question on using Beehiiv. I actually export the cards (tables and CTAs) as PNGs and embed those into the template I created in Beehiiv. Since I can't embed the full Gamma in Beehiiv, that is about as close to a 1:1 recreation as I can get.