A commonly-reported clutch hesitation or 'slipping' sensation is frequently the clutch pedal switch — a cheap dealer part — not the clutch itself. The actual clutch is durable, with originals lasting well past 100k miles; verify behavior on a test drive before assuming a clutch job.
The 'sticky clutch' is often a $30 pedal switch
Audi RS4 (B7) · drivetrain