Conversation so far:
What was the band Cynic's musical style?
Cynic's first recordings feature a more punk, thrash and hardcore sound
What did the band Cynic's sound change to?
in the 1990s their sound changed towards a highly complex, experimental and extremely technical form of progressive metal, while still retaining their death metal roots.
Did the band Cynic change their sound any more?
Their 1990 demo displays a hyper-technical form of death/thrash
Are there any other interesting aspects about the Cynic band article?
Cynic's 2008 album Traced in Air melded together the styles and influences heard on 1993's Focus with the more progressive-oriented Portal approach.

Question: What is a Portal approach?
Self-contained rewrite: What is a Portal approach for the band Cynic?