I think it depends upon what one thinks is necessary. Before the Roadrunner few people monitored TT speed carefully over periods of time. If nothing else, belts wear out or stretch. Then there is a bit of disagreement as to whether absolute speed accuracy is important. But I think there is consensus on the effects of table warm-up, for example. I recall HW writing not to do serious listening until the table has been going for 30 minutes or so for the reason that, unmonitored, the turntable will not reach its long-term speed setting for a while. Then there's stylus drag; don't know how great an issue..
FWIW I don't think the variostat will address inconsistencies in the power line frequency.
For me the best thing about this "monitoring and correction" is that is just one more thing I never have to think about. As the man said, "Just set it and forget it." So I can obsess about everything else.
FWIW I don't think the variostat will address inconsistencies in the power line frequency.
For me the best thing about this "monitoring and correction" is that is just one more thing I never have to think about. As the man said, "Just set it and forget it." So I can obsess about everything else.