[duped]

I'm not an artist or art historian but my understanding is that fresco (the technique) has no upsides other than longevity. It's time consuming, if the artist makes a mistake they need to start over, and has to be meticulously planned. That's why even the great masters of the Renaissance painted so few, and they tended to be large endeavors. It took a lot of time and planning to do one, even at a small scale.

Like if a Roman home owner decided they didn't like the fresco on their wall, it would take at least a year to paint a new one.