Blended learning: up to what point?

First of all, for those of you who may not know about blended learning, in general terms it's learning in the traditional way in schools AND through technology, at home. For more info, you can watch this short video:

In my experience, I haven't worked with online platforms at school until I got to the Teacher Training Course, where that way of working is very common. Sincerely, I feel a degree of regret for not having tried that, since from my point of view it is very helpful for both sides: the teacher, and the student. This provides teachers with many advantages, like having the possibility of having a very organised record of each student's progress. On the other side, students can work at any time they desire/can.

However, in my opinion it is better to be present when students are working, to see how they are doing and be in hand if they need any help; at the same time some autonomy from their part is also great. So in a certain manner and degree of implementation I can see a lot of advantages, of course always depending on the group characteristics.