Can you all add more info about the check-in / exit immigration lines at TPE in the morning? How long is each step taking typically, and how long before the flight time would you recommend arriving?
In the morning (9-11am), check-in should be a breeze with Premier Access. Security usually takes about 10 minutes unless it's a long holiday in Taiwan. Without a Taiwan passport, immigration could take anywhere from 15 to 45 minutes. Once you pass immigration, it shouldn't take you more than 10 to 15 minutes to walk to the furthest gates.