I still work on a Django monolith and agree on being able to focus 100% on business logic. I've found Angular is excellent for "sprinkling" a little JS into the frontend where necessary rather than going the full SPA/React route.
If data requires reloads or manipulations a side restful api needs to be created along the main endpoint which renders html. But it's fairly straightforward with DRF and the enforced by default apps/models structure of Django.
Until a certain point I find this arrangement enjoyable to work with. Once it stops, it's clear as day that the page should be rewritten from scratch with rendering on client side.
I think stimulus is more like angularJS. But modern angular definitely isn’t.