Pilor DAR wrote:
A pilot does not have to worry about exceeding safe maximum speeds, while still flying at an IAS of less than Vne.
Not so!
Vne is a TAS value, not an IAS value. For practical purposes at lower altitudes they can be treated as roughly the same. However, at high altitudes this becomes critical. Gliders regularly fly in in wave above 30,000 ft, and there the IAS value for Vne is substantially lower and needs to be known and respected.
[Edited to add: Wikipedia says "various" airspeeds for structural limitations. Those for gust factors etc remain unchanged, because they are related to the stall speed, but the flutter limitations are TAS based.