I've also started the guitar in the old school way and was quite comfortable with it for many decades (so: guess my age
). My first teacher also taught me that I should use apoyando on any technically possible melody.
However, I switched over about 6-7 years ago. It only took me a few weeks to getting used to it. My experience with it is very positive:
1. I have gained accuracy with this technique (for instance, pre-planting is easier)
2. Variations in tone are easier - the "new School" added new timbres to my tonal spectrum
3. I have gained RH-speed through natural relaxation of the Hand
I still use apoyando occasionally. This however just when I want to give a certain line a "Little extra".
Hope that helps.