Curious if React folks here have strong thoughts on SSR vs. SPA?

SSR as much as you can. It ships less code, is more secure, and significantly more productive for engineers to build in.

SPA when you need really advanced interactivity or client side state.

These days a hybrid model called "islands" is popping up a lot (see deno fresh / astro)

Building https://srcbook.com // creator of the https://blockchainsmokers.xyz 

this ^

if not deploying to ipfs/arweave and rather using vercel then nextjs "gets the job done"  wrt ssr w/ some spa

also people don't realize vercel has almost (acqui)-hired every js framework developer out there except Remix. so they will almost define what frontend tooling and patterns look like going forward