"It is desirable that people make music on the breath, with the breath." — Dietrich Fischer-Dieskau

In Romanticism, the main determinant is the mood, the atmosphere. And in that regard, you could also describe Schubert as a Romantic.

Particularly at around the age of 70 you reach a stage where you have to be very careful. If, at that point, you abandon the work you have been doing, there is a good chance that you will just collapse and drift.