Haven’t messed with it personally (yet), but I’ve seen some examples where Caddy can do some cool stuff (I think the example I saw recently was defining routes that can call an arbitrary program with the HTTP request details).
I use Nginx almost exclusively (I’ve got HAProxy in the mix, too, but it’s strictly for load balancing). Everyone always keeps recommending Traefik to me, but from what I’ve seen, it doesn’t do anything Nginx can’t already do, and the config is all bizarre and way less intuitive. Not saying it’s bad, just not for me. (This is not an invitation to proselytize Traefix at me lol).
Use whatever works for you.
Goddamnit. I fucking hate paginating comments and would rather just fetch all the top level ones and control the depth based on the number of total comments. I also hate that they see the API through the lens of Lemmy-UI (IMO the worst way to interact with Lemmy).