Acrobat 6.0 -

This version also introduced the tiered professional structure we know today:

Critics argued that Adobe was trying to do too much—turning a document viewer into a multimedia platform. This "bloat" is actually what spurred the creation of lightweight third-party readers like Foxit Reader, which gained popularity simply because they opened PDFs instantly while Acrobat 6.0 was still loading its splash screen. acrobat 6.0