I don't think copyright as a principle is obsolete. It generates useful economic incentives to create and distribute works, which I consider to be good things, and I have yet to encounter any alternative economic model that looks anything like as successful at achieving those things.

I do think the current implementation of copyright in law is flawed in a lot of places. This is bad because it potentially imposes excessive restrictions on ordinary people and sometimes limits how much we can take advantage of the benefits of new technologies. It is also bad because it brings the law into disrepute, and combined with the practical difficulty of enforcement particularly against small-scale infringement that is only a civil matter, it results in a general sense among much of the public that infringing copyright is a victimless crime and socially acceptable.