And you think not clapping between movements is strict? :)

I am very familiar with affectations here. I think it is good to have quiet but if people feel like expressing themselves and supporting the artist it is ok to clap. I don't know why there is such a fetish about it.

Performers also got away with showmanship. Performance now becomes very boring affair often.
I feel that situation will change. Going to a concert should be entertaining too.

There should be some degree of audience participation (not a formal one). There is a degree of theatricality in performance.

In Italy audience would express their likes and dislikes loudly. Now people just vote with their pockets so to say and don't go to many concerts. One hardly hear about anyone expressing their opinion loudly. It is very sterile affair now.