I think this is a question of personal preference. I have been in concrete and vinyl pools. As far as I am concerned from a swimmers point of view they are both fine.

When I decided to build a pool - I decided on a concrete because the contractors in the area were more experienced with it - I have seen 25+ year old concrete pools that are structurally sound - and I had a friend that had a vinyl pool that said that replacing the liner was a real pain and she wished she had a concrete pool (I did remind her that a concrete pool has maintenance as well).

I have only ever seen one pool "pop" out of the ground. It was 10' deep pool in an area of Florida about 12' above sea level in a flood plain - the person drained the whole pool - there was a large rain storm and out it came! Why - because the water table was higher than the bottom of the pool. You can't drain a vinyl pool all the way or the liner will get all messed up - so I don't think those "issues" are really issues at all.