I work on a large (I think) Django application, ~1000 endpoints, ~150k sloc. I've been thinking of how something of that size could work in a serverless context, and I really struggle to imagine it working well.

Between the startup time (importing that much Python takes a few seconds, fine for a long running server, not good per-request), and all the dev-ops/infrastructure automation to get it all working correctly in dev/prod, I just think it would be more effort than it's worth, compared to running in "normally" on a cluster of VMs or dedicated machines.