Yes, that is another idea that might work since top charging is not much faster than Level 2 charging, so might as well just use a Level 2 instead.
Gas tanks are a bad analogy because they fill at a constant rate. Charging above 80% is like slowly turning the gas pump down to a trickle, and saying it’s fine to stay as long as 0.1 gal/min is still flowing. At some point you have to consider the flow is effectively nothing and it’s time to move on.
Congratulations, you have irrational range anxiety.
As long as I have at least 40%, I can basically go anywhere I need to in my area, so it’s of no concern if I leave home with 50% battery or higher. I use about 30% per day and charge daily to 80%.
I got downvoted for suggesting this only a few days ago, but Tesla has just implemented a new $1/min congestion fee if you charge above 90% at certain locations when the Supercharger is busy. This should help improve throughput and reduce wait times at congested Superchargers. Charging past 90% is extremely slow, and in most cases it is faster overall to make a second charging stop.