I will respectfully agree and disagree. For ordinary calls it is not a bad practice and is quite common. For DX it depends on who they are and how many are calling them. Usually I will move off frequency for any relatively rare DX or if a lot of people are calling someone, and for sure for DXpeditions. I would estimate 95% of the people who respond to my CQ do so on frequency, and vice versa. Of course I only have 5,000+ FT8 contacts in the log. The concept of always or mostly calling off frequency is nice, and certainly made sense before FT8 became so popular. It seems to me that these days the FT8 segments are almost always crowded, except maybe 10-12 meters. Of course crowded is relative. I have very good antennas for every band and I routinely work stations that others cannot hear, so I tend to see a lot of activity that perhaps others do not.