After many years of experiments i came to the same exact conclusion.
In 15 years I haven't seen a single case when splitting a project into multiple apps brought anything but pain.
Also, splitting files like models into packages is also a great approach. 6 months ago I found myself with models.py, API.py (my alternative for API views vs regular views) and serializes.py each over 3k lines of code. Spent 3 days splitting them into small files by topic. Way easier to work.
I also wish docs suggested that it is an option and better to split them earlier. Because it is so easy to just "add one more model to the end of the file, what can go wrong?"
In 15 years I haven't seen a single case when splitting a project into multiple apps brought anything but pain.
Also, splitting files like models into packages is also a great approach. 6 months ago I found myself with models.py, API.py (my alternative for API views vs regular views) and serializes.py each over 3k lines of code. Spent 3 days splitting them into small files by topic. Way easier to work.
I also wish docs suggested that it is an option and better to split them earlier. Because it is so easy to just "add one more model to the end of the file, what can go wrong?"
You understand what goes wrong after 2-3k LoC