Well, if you and the client dont mind spending literally ten years painting a ceiling, and you can charge accordingly... More power to you.My take (for what it's worth):
They didn't spray the Sistine Chapel, and nobody complains about the quality... 🤷♂️
I sometimes do the 'wait until the end for the final coat, too.' Depends on how my schedule is though. If I HAVE another job to go to until that time, great.