Sync Conf is next week, and this sort of issue is so part of what I hope maybe can just go away. https://syncconf.dev/

Efforts like Electric SQL to have APIs/protocols for bulk fetching all changes (to a "table") is where it's at. https://electric-sql.com/docs/api/http

It's so rare for teams to do data loading well, rarer still we get effective caching, and often a products footing here only degrades with time. The various sync ideas out there offer such an alluring potential, of having a consistent way to get the client the updated live data they need, in a consistent fashion.

Side note, I'm also hoping the js / TC39 source phase imports proposal aka import source can help let large apps like NextCloud defer loading more of it's JS until needed too. But the waterfall you call out here seems like the real bad side (of NextCloud's architecture)! https://github.com/tc39/proposal-source-phase-imports